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Synergy.png

Some items will produce a unique effect when held at the same time. A light blue arrow will appear above players for a short duration to show that a special combo has been activated.

Synergies were significantly reworked in the Advanced Gungeons & Draguns Update. Along with numerous synergies being introduced and synergies made easier to acquire, every synergy was given a name and players can check what currently held items are synergizing in the Ammonomicon by selecting an item in a synergy, highlighting the other items in the synergy.

NotesEdit

  • For any synergy that includes guns, any stat modifications granted by the synergy only apply to the guns in the synergy. At times, the synergy only applies with one of the synergized weapons.

List of SynergiesEdit

Name Items Effect Sprite
360 Yes Scope  
Scope
One of the following:
 
A.W.P.
 
Sniper Rifle
Spinning 360 degrees provides a 3-second buff that gives the next shot a 1.5x damage multiplier. The buff stacks if the player spins multiple times.
Absent Minded
 
The Membrane
 
Bouncy Bullets
The Membrane's shots bounce 4 times and become homing.
Added Effect - Fire
 
Alpha Bullet
 
Hot Lead
The first shot of each magazine is guaranteed to be a fire bullet.
Added Effect - Ice
 
Alpha Bullet
 
Frost Bullets
The first shot of each magazine is guaranteed to be an ice bullet.
Added Effect - Poison
 
Alpha Bullet
 
Irradiated Lead
The first shot of each magazine is guaranteed to be a poison bullet.
Akey Breaky
 
AKEY-47
 
Shelleton Key
AKEY-47 receives a damage boost (10 damage per bullet), infinite ammo, and changes in appearance to resemble a Shelleton and can no longer open locks by shooting at them.  
AI Assistant
 
Roll Bomb
 
iBomb Companion App
Roll bombs will bounce around instead of detonating immediately, and can be manually detonated with iBomb Companion App.
Air Support
 
Air Strike
 
Explosive Rounds
Air Strike covers a massive area.
AK-47 (Island Forme)
 
AK-47
 
Orange
Pressing reload with a full magazine toggles Island Forme. Island Forme AK-47 fires oranges, which deal more damage than regular AK-47 shots. Each orange does 7 damage per shot, as opposed to the usual 5.5.  
Alas, Sniperion
 
Crown of Guns
 
Crescent Crossbow
Crown of Guns transforms into a tiara that fires higher-damage crescent-shaped bullets.
Alistair's Ladder
 
Thunderclap
 
Shock Rounds
Thunderclap shoots 2 bullets instead of one.  
All Out Of Law  
Colt 1851
One of the following:
 
Table Tech Sight
 
Escape Rope
 
Heart Holster
 
Hip Holster
Colt 1851 fires three tight spreads of three free bullets upon reloading. These projectiles ignore tables when fired from behind them.
Alternative Rock  
Face Melter
One of the following:
 
Drum Clip
 
Melted Rock
 
Gilded Bullets
 
Platinum Bullets
 
Heavy Bullets
 
Ruby Bracelet
Face Melter fires two parallel columns of notes, shoots a guitar pick with a chance to stun upon reloading, and changes appearance to that of a Dean Z Blue Burst guitar.  
Ancient Aliens
 
Zorgun
 
Alien Engine
Gives Zorgun 3 Final Shots, and gives Alien Engine occasional Zorgun bullets.
Anti-Aircraft
 
RPG
 
Flak Bullets
RPG spawns 7 homing flak bullets upon impact.
Antichamber
 
Dark Marker
 
Antibody
Dark Marker alternates between firing red and blue shots that become very slow and large after traveling a short distance. If any red and blue shots touch, the blank effect is activated.
Apiary
 
Bee Hive
 
Box
Bee Hive turns into an apiary and automatically regenerates ammo over time.  
Assault and Battery
 
Shock Rifle
 
M16
The guns are dual-wielded.
Arctic Warfare  
A.W.P.
One of the following:
 
Frost Bullets
 
Heart of Ice
 
Frost Ammolet
 
Snowballets
A.W.P.'s color changes to orange and white, its shots freeze enemies, and it deals 62.5% more damage.  
Armored Corps
 
AC-15
 
Void Core Assault Rifle
Both guns gain increased shot speed and deal 25% more damage.
Backdraft  
Armor of Thorns
One of the following:
 
Ring of Fire Resistance
 
Copper Ammolet
 
Ruby Bracelet
Touching enemies sets them on fire.
Bacon and Eggs
 
The Scrambler
 
Pig
Increases the speed of The Scrambler's eggs by 50%.
Banshee Cry
 
Screecher
 
Dueling Laser
Screecher fires a cone of three waves per shot.
Barrage Shot
 
Charge Shot
 
Jetpack
Decreases the charge time of Charge Shot by 25%, increases reload time by 50%, and increases shot size.
Battery Powered  
Shock Rifle
One of the following:
 
R2G2
 
Shock Rounds
Shock Rifle slowly regenerates ammo over time.  
Battle Mode  
Orbital Bullets
One of the following:
 
Bomb
 
Ice Bomb
Bombs periodically spawn and orbit the player, exploding and dealing 40 damage upon touching an enemy.
Bee Plus
 
Honeycomb
 
Jar of Bees
Taking damage causes Honeycomb to spawn hornets, which travel faster and deal more damage than regular bees.
BEES  
Bee Hive
One of the following:
 
Honeycomb
 
Bumbullets
Doubles the size of Bee Hive's bees and increases their damage by 25%, but decreases Bee Hive's rate of fire by 34%.
Behold!
 
Com4nd0
 
Eye of the Beholster
 
M1911
 
Machine Pistol
 
Trank Gun
 
Void Marshal
When Eye of the Beholster is held, the other five guns rotate around the player and shoot at nearby enemies, still using up ammo from each gun.

Obtainable through the Beholster Shrine.

Beta Ray
 
Gamma Ray
 
Irradiated Lead
Gamma Ray's beam grows larger and deals more damage.  
Betrayer's Lies
 
Betrayer's Shield
 
Lies
Betrayer's Shield gains infinite ammo, a much larger magazine size, and extremely high fire rate. Like other guns with infinite ammo, it cannot reveal secret rooms.  
Big Shotgun Gun
 
BSG
 
Big Shotgun
Big Shotgun fires 4 projectiles instead of 3. The player also has an extended roll while holding the Big Shotgun.
Birthright
 
Baby Good Shelleton
 
Shellegun
While Shellegun is held, Baby Good Shelleton alternates between its laser and a wide-angle shot similar to the Shelleton enemy.
Black Flag  
Corsair
One of the following:
 
Serious Cannon
 
Grappling Hook
Corsair gains a black flag, and every Corsair shot will periodically fire two bouncing cannonballs perpendicular to itself as it travels.  
blade  
Kruller Glaive
One of the following:
 
Blood Brooch
 
Ring of Chest Vampirism
Kruller Glaive's damage is increased by 20%, enemies hit will visually bleed, and jammed enemies will revert to normal on hit.
Blade Runner
 
Deck4rd
 
Origuni
Increases the magazine size of both weapons by 50%.
Blammo!
 
Bullet
 
Shell
The guns are dual-wielded.
Blank Generation
 
Elder Blank
 
Blank Companion's Ring
Companion changes appearance to be older, automatically fires a second blank after Elder Blank's blank duration ends.  
Blast Crown
 
Crown of Guns
 
Blast Helmet
Crown of Guns has a chance to fire explosives.
Blessing and a Curse
 
Cursed Bullets
 
Silver Bullets
Every jammed enemy killed grants a persistent, additive 0.0025 (0.25%) damage buff.
Block Party
 
Brick Breaker
 
Mustache
Increases the size of Brick Breaker's shells by 50%, and increases their damage by 25%.
Bluer Guon Stone  
Blue Guon Stone
One of the following:
 
+1 Bullets
 
Bullet Time
 
Amulet of the Pit Lord
Blue Guon Stone's size and rotation speed is increased. If Blue Guon Stone blocks a bullet, it deals 15 damage to all nearby enemies.
Blunderbrace
 
Blunderbuss
 
Macho Brace
Blunderbuss gains 50% increased shot speed and 25% larger bullets along with a shorter charge time.  
Bomberpal
 
Bomb
 
Lil' Bomber
Lil' Bomber fires two bombs instead of one, charges twice as fast, and has 40% lower reload time.
Brave New World  
Siren
One of the following:
 
Trident
 
Bionic Leg
While Siren is held, spawns a fish companion which shows what items are inside chests without opening them.  
Breakfast Club
 
Wind Up Gun
 
Seven-Leaf Clover
Halves the reload time of Wind Up Gun, increases fire rate by 60%, and increases damage by 50%. Increases magazine size to 27, and all but the last 10 shots of each magazine will be stronger piercing lasers.
Buggin' Out
 
Bug Boots
 
Gungeon Ant
While Gungeon Ant is held, Bug Boots spread oil instead of poison, and the player is immune to fire.
Bullet Kiln  
Elder Blank
One of the following:
 
The Kiln
 
Luxin Cannon
Using Elder Blank while having The Kiln or Luxin Cannon selected gives one Glass Guon Stone to the player, up to a maximum of four. This limit can be worked around by dropping excess glass guon stones on the floor before using the Elder Blank, and then collecting them again.
Bullet or the Egg
 
The Scrambler
 
Chicken Flute
Scrambler shots become larger and split into 10 seekers instead of 5.
Bubble Trouble
 
Bubble Blaster
 
Siren
Siren now shoots a single, large bullet, and Bubble Blaster gains homing shots.
Buckle Up
 
Gungine
 
Ammo Belt
Gungine has a chance to not consume ammo upon firing. Continuously moving with Gungine held gives the player a yellow glow, significantly increasing Gungine's rate of fire. The glow disappears if the player stops moving. If the player switches to another gun while outlined, they can keep the rate of fire bonus.
Buster Gun
 
Excaliber
 
RPG
Excaliber fires 3 or 4 projectiles in a cone when reloaded.  
Cactus Flower  
Cactus
One of the following:
 
Broccoli
 
Orange
Cactus has a chance to shoot out a prickly pear that bounces off walls and shoots needles all around.  
Camera Shy
 
Camera
 
Chaff Grenade
Camera has a chance to stun enemies.
Captain Plant It
 
Unity
 
Portable Turret
Portable Turret gains Unity's damage bonus.
Careful Iteration  
Casey
One of the following:
 
Armor of Thorns
 
Shotgun Full of Hate
 
Nail Gun
 
Eyepatch
Casey becomes spiked and fires a spread of 6 nails each time it is swung.  
Cash Rules Everygun Around Me
 
Brick of Cash
 
Briefcase of Cash
When firing any gun, occasionally fires money which charms enemies.
Cast Iron  
Big Iron
One of the following:
 
Bundle of Wands
 
Witch Pistol
 
Hexagun
Gives Big Iron transmogrification effects and replaces each bullet with one from Bundle of Wands, Witch Pistol, and Hexagun.
Cat Friend
 
Cat Claw
 
Bait Launcher
Bait Launcher's tigers attach several Cat Claw needles onto enemies when they maul them.
Cerebral Bros  
Bullet Bore
One of the following:
 
Bow
 
Charmed Bow
 
Explosive Rounds
 
Cluster Mine
Bullet Bore fires 2 drills per shot instead of the usual 1.  
Chain Lightning
 
Shock Rounds
 
Shadow Bullets
Increases the range that Shock Rounds connects bullets with electricity. Lightning can also connect to enemy bullets.
Chance On Hit
 
Gunderfury
 
Silver Bullets
Gunderfury shots have a chance to slow enemies.
Chest High is the Best High
 
Mourning Star
 
Cog of Battle
Increases damage by 25% and activates the Macho Brace effect after flipping a table. This version of the Macho Brace effect is different to the actual item's, as it increases damage by 100% for a brief time rather than Macho Brace's 30%.
Chicken Arise  
Magic Bullets
One of the following:
 
Bundle of Wands
 
Hexagun
 
Staff of Firepower
 
Witch Pistol
Increases the chance for the guns to transmogrify enemies.
Chief Master  
Alien Sidearm
Two of the following:
 
Master Round I
 
Master Round II
 
Master Round III
 
Master Round IV
 
Master Round V
Alien Sidearm has a much larger magazine and cannot be charged, but becomes fully automatic and the final two shots in the magazine are fully-charged shots.  
Circle of Bricks
 
Brick Breaker
 
Tetrominator
The guns are dual-wielded.
Clawntlet
 
Cat Claw
 
Gunknight Gauntlet
The player releases a spiral of bullets whenever they take damage.
Clearer Guon Stone  
Clear Guon Stone
One of the following:
 
+1 Bullets
 
Bottle
 
Amulet of the Pit Lord
Grants immunity to poison, fire, and electricity. Shooting enemies while standing on fire or ice will burn or freeze them, respectively.
Cold 1896
 
Colt 1851
 
Cold 45
The guns are dual-wielded. Both guns' magazine sizes are doubled.
Cold Ones
 
Frost Bullets
 
Frost Ammolet
Significantly increases the chance of firing ice bullets.
Comammo Belt
 
Com4nd0
 
Ammo Belt
Com4nd0 gains double magazine size and changes appearance.  
Contractual Obligation
 
Devolver
 
Gungine
A pool of oil spawns underneath enemies killed with Gungine.
Contrail  
Alien Engine
One of the following:
 
Mutation
 
Shotgrub
Alien Engine's sprite changes and the flame turns green, igniting enemies with green fire. Alien Engine also grants flight while held.  
Cool Kids Club
 
Devolver
 
Strafe Gun
Continuously moving with Strafe Gun held gives the player a yellow glow, increasing movement speed. The glow disappears if the player stops moving.
Cormorant
 
Gunknight Helmet
 
Gunknight Armor
 
Gunknight Gauntlet
 
Gunknight Greaves
Transforms the player into Cormorant. Removes reload times from all guns entirely. Increases curse by 3.  
Cosmic Horror
 
Abyssal Tentacle
 
Black Hole Gun
Black holes fire three tentacles while active.
Crave the Glaive
 
Kruller Glaive
 
Boomerang
Kruller Glaive will try to hit every enemy in the room before returning, similar to the Boomerang.
Crestfallen Soul
 
Crestfaller
 
Gun Soul
Increases dodge roll speed by 20%. Crestfaller deals 50% more damage if the player dies and has not yet retrieved their soul.
Criticaliber
 
Vorpal Gun
 
Bullet Idol
After taking damage with Vorpal Gun held, the next Vorpal Gun shot is guaranteed to be a critical shot.
Cryptic Cryptids
 
Phoenix
 
Fossilized Gun
Phoenix shoots out rows of fire on the ground. Both guns pierce enemies and deal additional damage. The player is immune to fire while the guns are held.
Crystal Horn
 
Luxin Cannon
 
Unicorn Horn
Luxin Cannon gets three crystal shots at the end of each magazine, and each crystal shot bursts into many more crystals. Additionally, when an enemy is killed with Unicorn Horn, they explode into Luxin Cannon projectiles.
Dawn of the Gundead  
Zombie Bullets
One of the following:
 
Gunslinger's Ashes
 
Shellegun
 
Fossilized Gun
 
Skull Spitter
 
VertebraeK-47
Doubles the chance for Zombie Bullets to refund missed shots for the guns.
Dead Cell
 
Railgun
 
Fortune's Favor
Decreases Railgun's charge time and increases its damage to bosses by 30%.
Dead Place
 
Mine Cutter
 
Melted Rock
Increases Mine Cutter's damage by 25%.
Dead Prez
 
Derringer
 
Dueling Pistol
Derringer fires bouncing Dueling Pistol shots. Dueling Pistol fires a wide spread of 4 bullets alongside its normal shots.
Deadly Distraction
 
Decoy
 
Monster Blood
Decoy creates a large poison pool when attacked.  
Deadlier Distraction
 
Explosive Decoy
 
Monster Blood
Decoy explodes and creates a large poison pool when attacked.  
Death Square
 
Dueling Pistol
 
Dueling Laser
Damaging enemies with Dueling Pistol rapidly recharges Dueling Laser.
Decorated
 
Hegemony Carbine
 
Galactic Medal of Valor
Hegemony Carbine fires triple shots.
Decoy Octorok  
Abyssal Tentacle
One of the following:
 
Decoy
 
Explosive Decoy
The decoy will turn into a charmed enemy.
Detective Magnum
 
38 Special
 
Magnum
The guns are dual-wielded.
Detective Mode
 
Badge
 
38 Special
Increases 38 Special's maximum ammo to 600, halves reload time, and increases damage by 20%. The police officer will also reveal the contents of nearby chests.  
Devil's Plaything
 
Armor of Thorns
 
Bullet Idol
Bullet Idol orbits the player, blocking enemy shots.
Diamond Weapon
 
Omega Bullets
 
Frost Bullets
The last shot of each magazine is guaranteed to be an ice bullet.
Diazepam  
Muscle Relaxant
One of the following:
 
A.W.P.
 
Bow
 
Hegemony Rifle
 
Hexagun
 
Laser Rifle
 
M1
 
Sniper Rifle
 
Winchester Rifle
Increases the damage of the guns by 50%.
Don't Hoot the Messenger
 
Dungeon Eagle
 
Owl
Dungeon Eagle's charged shots gain significant knockback.  
Don't Worry About The Vase  
The Kiln
One of the following:
 
Chaos Ammolet
 
Copper Ammolet
 
Frost Ammolet
 
Gold Ammolet
 
Lodestone Ammolet
 
Uranium Ammolet
Destroying small breakable objects (vases, barrels, etc.) has a small chance to activate a blank effect.
Double Down
 
Gunboots
 
Springheel Boots
Removes the cooldown from Gunboots; every roll will fire bullets.
Double Double Helix
 
Helix
 
Helix Bullets
Helix Gun Fires 4 projectiles per shot instead of 2, damage is increased by 25%, and shot speed is increased by 50%.  
Double Rainbow
 
Unicorn Horn
 
Stuffed Star
While Stuffed Star is active, five Unicorn Horn beams are fired from the player in all directions.
Dr Worm
 
Heck Blaster
 
Drum Clip
Heck Blaster ammo replenishes slowly.
Dragunice
 
Dragunfire
 
Heart of Ice
Dragunfire shoots a blue fireball that has a chance to burn and/or freeze enemies.
Dualing Pistol
 
Dueling Pistol
 
Helix Bullets
Dueling Pistol changes appearance and its shots seek enemies.  
Dumb Smart Bullets
 
Scattershot
 
Homing Bullets
Bullets unaffected by Homing Bullets become larger and deal 50% more damage.
Dwarven Stout
 
Stout Bullets
 
Double Vision
Double Vision triples shots instead of doubling them.
The Ecstasy Of Gold  
Gilded Bullets
One of the following:
 
Gilded Hydra
 
Old Goldie
Increases the damage of both guns by 25%.
EGG MURDERER
 
Light Gun
 
The Scrambler
Light Gun's ducks periodically send out two Scrambler shots perpendicular to itself as it travels.
Elder Blank Bullets
 
Elder Blank
 
Blank Bullets
Blank Bullets's blank effect reflects bullets instead of deleting them.
Electron Pack  
Proton Backpack
One of the following:
 
Zombie Bullets
 
Ghost Bullets
Kills with Proton Backpack spawn allied ghosts that attack enemies.  
Emerald Weapon
 
Omega Bullets
 
Irradiated Lead
The last shot of each magazine is guaranteed to be a poison bullet.
Emergency Help
 
Flare Gun
 
Medkit
Reduces the reload time of Flare Gun by 66% and increases its damage by 50%. While Flare Gun is held, random enemies will periodically have explosions erupt around them, damaging them and hurting other enemies around them.
Empty Vessels
 
Bottle
 
Holey Grail
If damage is taken while Bottle is empty, it fills with a purple flame that deals 100 damage to all enemies in the room upon use.  
Enter the Fruitgeon
 
Orange
 
Orange Guon Stone
Orange Guon Stone fires oranges at enemies, dealing 7 damage.
Extreme Operation
 
Melted Rock
 
Ammo Synthesizer
Using Melted Rock causes corpses to shoot at enemies.
Fairy Bow
 
Bow
 
Bomb
Halves the charge time of Bow and adds a chance of firing an extra arrow, similar to the effect of Shadow Bullets.
Finger on the Pulse  
Pulse Cannon
One of the following:
 
Heart Lunchbox
 
Heart Holster
 
Heart Bottle
 
Heart Purse
 
Heart Locket
Upon taking damage, spawns 3 Pulse Cannons that attack enemies.
Fear the Old Blood  
Trick Gun
One of the following:
 
Blood Brooch
 
Bloody Eye
 
Rolling Eye
Decreases the reload time of Trick Gun by 33% and increases fire rate by 20%.
Fightknives
 
Fightsabre
 
Knife Shield
Activating Knife Shield while holding Fightsabre makes the spawned knives reflect bullets before getting destroyed. Knives spawned this way are tinted green.  
Fightsabre Training
 
Fightsabre
 
Blast Helmet
While Fightsabre is held, an orbital appears that blocks enemy shots.  
Firing With Flair  
Flare Gun
One of the following:
 
Copper Ammolet
 
Amulet of the Pit Lord
 
Master of Unlocking
 
Springheel Boots
Flare Gun sets green fire, which leaves enemies permanently burning.  
Five O'Clock Somewhere  
Crestfaller
One of the following:
 
Old Knight's Flask
 
Shotga Cola
 
Double Vision
 
Potion of Gun Friendship
 
Shotgun Coffee
 
Potion of Lead Skin
Reloading will fire a glass bottle that will stun enemies it hits. Reloading while standing on a liquid replenishes the ammo missing in the current magazine, similar to Gungine.  
Flat Stanley
 
Mailbox
 
Box
Reduces the magazine size of Mailbox by 50% and reduces its reload time by 33%.
Friend to Gun and Bullet
 
+1 Bullets
 
Potion of Gun Friendship
While Potion of Gun Friendship is active, a copy of the player's current gun appears and automatically fires at nearby enemies.
Frosty Distraction
 
Decoy
 
Heart of Ice
Decoy freezes enemies that attack it.  
Frostier Distraction
 
Explosive Decoy
 
Heart of Ice
Decoy freezes enemies that attack it and explodes after a short period.  
Frosty the Bullet Tyrant
 
Snowballer
 
Frost Bullets
Snowballer shots increase in size and damage the further they travel.
Full Circle
 
Tangler
 
Rolling Eye
Tangler becomes round, turns enemies round instead of rectangular, and gains increased damage and reload time.
Future Gangster  
Thompson Sub-Machinegun
One of the following:
 
Bionic Leg
 
Laser Sight
 
Shock Rounds
 
Nanomachines
Thompson Sub-Machinegun fires lasers. Each laser does 6.5 damage instead of the normal 5 damage.  
Garbage Collecting
 
Trashcannon
 
Unity
Hitting an enemy with Trashcannon causes it and its bullets to briefly freeze.
Get Equipped With -A-
 
Megahand
 
Balloon Gun
Enables Air Shooter mode which fires Balloon Gun tornadoes when uncharged. Modes can be switched by reloading Megahand with a full magazine.  
Get Equipped With -B-  
Megahand
One of the following:
 
Mega Douser
 
Bubble Blaster
Enables Bubble Lead mode which fires Bubble Blaster bubbles when uncharged. Modes can be switched by reloading Megahand with a full magazine.  
Get Equipped With -C-
 
Megahand
 
Bullet Bore
Enables Crash Bomber mode, which fires a Bullet Bore bullet at full charge. Modes can be switched by reloading Megahand with a full magazine.  
Get Equipped with -F-  
Megahand
One of the following:
 
Camera
 
Aged Bell
Enables Time Stopper mode, which fires a flash that stops time for a second and deals damage to all enemies on screen when fully charged. Modes can be switched by reloading Megahand with a full magazine.  
Get Equipped With -H-
 
Megahand
 
Hot Lead
Enables Atomic Fire mode which fires piercing fireballs when uncharged that set everything in their path on fire. Modes can be switched by reloading Megahand with a full magazine.  
Get Equipped With -M-
 
Megahand
 
Buzzkill
Enables Metal Blade mode which fires Buzzkill shots when uncharged. Modes can be switched by reloading Megahand with a full magazine.  
Get Equipped With -Q-
 
Megahand
 
Boomerang
Enables Quick Boomerang mode which fires small boomerang shots that stun enemies when uncharged. Modes can be switched by reloading Megahand with a full magazine.  
Get Equipped With -W-
 
Megahand
 
Mahoguny
Enables Leaf Shield mode, where uncharged shots fire leaves while charged shots fire regular charged Megahand shots. Killing enemies in this mode spawns leaves that orbit the player, blocking enemy shots. Modes can be switched by reloading Megahand with a full magazine.  
Ghost With The Most  
Gunslinger's Ashes
One of the following:
 
Ring of Ethereal Form
 
Ghost Bullets
Ghosts from Gunslinger's Ashes are larger and can freeze enemies. Reload time decreased by 20%.
Gilded Tables
 
Gilded Bullets
 
Table Tech Money
Tables have a 15% chance to be golden. Flipping a golden table will cause all normal enemies in the room to drop 2 to 6 extra   upon death. Golden tables will not automatically flip due to Table Tech Money.
Great Queen Ant  
Gungeon Ant
One of the following:
 
Gilded Bullets
 
Coin Crown
 
Heck Blaster
 
Crown of Guns
 
Ring of Fire Resistance
Gungeon Ant becomes an ant queen and shoots rocket ants.  
Green Thumb
 
Knight's Gun
 
Pea Shooter
Greener Guon Stone  
Green Guon Stone
One of the following:
 
+1 Bullets
 
Pea Shooter
 
Amulet of the Pit Lord
Chance for the Green Guon Stone to heal upon taking damage is raised to 70% if that damage would have killed the player. 20   also appears whenever Green Guon Stone heals the player.
Grouch
 
Trashcannon
 
Junk
Increases Trashcannon damage by 25%.
Gruber's Bane
 
Backup Gun
 
Shadow Bullets
Backup Gun has a 100% chance of firing shadow bullets.
Gunderlord
 
Ice Breaker
 
Patriot
Patriot shots are connected with electricity. Ice Breaker fires single high-velocity shots instead of shotgun spreads, and Ice Breaker ammo slowly regenerates over time.  
Gungeonite
 
Gamma Ray
 
Clear Guon Stone
Gamma Ray leaves poison on the ground.
Gunnerang
 
Boomerang
 
Utility Belt
Increases the damage of thrown guns by 50%.
Guns and Deviltry
 
Grey Mauser
 
Winchester Rifle
Increases the guns' damage by 25%, and they fire a knife whenever reloading.
Hacker
 
Lower Case r
 
Bracket Key
Increases the damage of Lower Case r by 25%.
Hail, Satan!
 
Demon Head
 
Pitchfork
Demon Head gains piercing.
Hail To The King
 
Yari Launcher
 
Oiled Cylinder
Increases Yari Launcher's magazine size by 50% and damage by 20%.
Hammer and Anvil
 
Cobalt Hammer
 
Anvillain
Firing Cobalt Hammer's charge attack also sends out anvils in all directions.
Hammer and Nail
 
Nail Gun
 
H4mmer
Increases max ammo of both guns by 50%. Nail Gun deals triple damage. H4mmer gets 5 hammer shots at the end of every magazine.  
Hard Light
 
Hyper Light Blaster
 
Light Gun
Hyper Light Blaster gains homing and its maximum ammo is increased by 50%. Light Gun has a chance to regenerate ammo when hitting enemies.  
Hardwood  
Mahoguny
One of the following:
 
Decoy
 
Explosive Decoy
 
Heavy Boots
 
Broccoli
Mahoguny fires four explosive shots at a time.
Heads Up
 
GuNNER
 
Stone Dome
Stone Dome fires homing skulls.
Heart-Shaped Box
 
Lament Configurum
 
Heart Lunchbox
Lament Configurum heals the player instead of dealing damage.
Heavy Artillery
 
Com4nd0
 
Vulcan Cannon
The guns are dual-wielded.
Heavy Jolt
 
Jolter
 
Heavy Bullets
Jolter changes appearance, gains increased knockback and increased accuracy.  
Heavy Metal  
Anvillain
One of the following:
 
Heavy Boots
 
Heavy Bullets
Decreases Anvillain's shot speed by 25% and increases damage by 20%.
Hegemony Special Forces  
Hegemony Rifle
One of the following:
 
Galactic Medal of Valor
 
Drum Clip
 
Ammo Belt
Hegemony Rifle bullets are replaced by piercing lasers.  
Hellhole  
Singularity
One of the following:
 
Sixth Chamber
 
Yellow Chamber
 
Holey Grail
Singularity spawns a hell portal that sucks enemies in and deals high damage.
Hell Singing  
Silver Bullets
One of the following:
 
Blunderbuss
 
Dueling Pistol
 
Trick Gun
Increases the damage of the guns against jammed enemies by 50%.
This bonus stacks with the damage from Silver Bullets, for a total of 487.5% damage to jammed enemies.
Hidden Tech Bees  
Table Tech Blanks
One of the following:
 
Bumbullets
 
Jar of Bees
 
Bee Hive
A swarm of bees replaces enemy bullets when a table is flipped.
Hidden Tech Big Shotgun
 
Table Tech Shotgun
 
Big Shotgun
Table Tech Shotgun shoots Big Shotgun rounds when Big Shotgun is held.
Hidden Tech Flare
 
Table Tech Heat
 
Hot Lead
Flipping tables ignite enemies in higher damage green fire. Range is also greatly increased
Hidden Tech Time  
Table Tech Sight
One of the following:
 
Liquid Valkyrie
 
Bloody Eye
Flipping a table briefly stops time.
Holy Bell
 
Trident
 
Aged Bell
Killing an enemy with Trident creates a large circular area that slows time.
Hornucopia
 
Banana
 
Charm Horn
Banana splits into 5 new bananas instead of 3 upon impact, one of which will explode into 4 more bananas. Using Charm Horn fires a banana at each enemy it charms.
Hot Head
 
Stone Dome
 
The Kiln
Stone Dome shots burn enemies.
Hot Ones
 
Copper Ammolet
 
Hot Lead
Significantly increases the chance of firing fire bullets.
Hot Rolls
 
Ring of Fire Resistance
 
Cloranthy Ring
Rolling creates a trail of fire.
Hotter Than Heck
 
Pitchfork
 
Flame Hand
Increases the size and damage of the guns by 25% and grants immunity to fire.
http://merch.devolverdigital.com
 
Microtransaction Gun
 
Mustache
Doubles Microtransaction Gun's damage.
Human Shield
 
Crisis Stone
 
Melted Rock
Upon use, Melted Rock spawns a Betrayer's Shield shield on every corpse.
Hunter-Seeker Tables
 
Com4nd0
 
Table Tech Rocket
Table rockets home in on enemies while Com4nd0 is held.
Hydro Pump
 
Mega Douser
 
Escape Rope
Increases the size, knockback, speed, and damage of Mega Douser's stream.
Hyper Beam
 
Heroine
 
Pig
When Pig dies, Heroine's ammo is fully refilled and it temporarily switches to Hyper Beam mode, where uncharged shots deal 80 damage and charged shots deal 160 damage. Heroine will automatically revert to its original form after 30 seconds.  
I need scissors! 61!  
Trank Gun
One of the following:
 
Cigarettes
 
Box
 
Ration
 
Wolf
 
Ancient Hero's Bandana
Trank Gun's fire rate is decreased, damage and reload time are increased, and its bullets will inflict slow and stun.  
I Studied The Blade
 
Super Meat Gun
 
Buzzkill
The guns are dual-wielded.
Ice Accumulation  
Snowballets
One of the following:
 
Cold 45
 
Ice Breaker
Significantly increases the size of the gun's shots, and increases the amount of damage they gain from Snowballets.
Ice Beam
 
Heroine
 
Frost Bullets
Enables Ice Beam mode, which fires a projectile that instantly freezes an enemy when fully charged. Modes can be switched by reloading Heroine with a full magazine.  
Ice Cap  
Freeze Ray
One of the following:
 
Camera
 
Flash Ray
Freeze Ray freezes enemies much quicker.  
Ice To Meet You  
Heart of Ice
One of the following:
 
Ice Cube
 
Frost Bullets
Firing with any gun will periodically fire a Heart of Ice projectile that splits and bounces.
Ice Water
 
Mega Douser
 
Snowballer
Mega Douser freezes enemies and leaves a trail of ice. Both weapons deal 30% more damage, and the size of the Mega Douser's stream is increased.
In The Mood!

Two of the following:

 
BSG
 
Thunderclap
 
Strafe Gun
Slightly increases movement speed and increases the shot speed of the guns by 25%.
Inconsistent Scale
 
Bee Hive
 
Gungeon Ant
While Gungeon Ant is held, creates a beehive orbital that spawns bees.
Insight
 
Huntsman
 
Trick Gun
A creature appears at entrances to secret rooms, revealing their location.  
Iron Slug  
Big Iron
One of the following:
 
Scope
 
Heavy Boots
 
Heavy Bullets
 
Fat Bullets
 
Stout Bullets
Big Iron fires a single high-damage slug.  
Iron Stance  
Heavy Boots
One of the following:
 
Blooper
 
Blunderbuss
 
Elephant Gun
 
Huntsman
 
Old Goldie
 
Pulse Cannon
 
Regular Shotgun
 
Siren
 
Tangler
 
Void Shotgun
 
Zilla Shotgun
Increases damage and knockback by 20%, increases shot speed by 50%, and decreases reload time by 20%.
Iroquois  
MAC10
One of the following:
 
Eyepatch
 
Cigarettes
 
Rolling Eye
Decreases the reload time of MAC10 by 33%, increases its magazine size by 50%, and increases its knockback by 50%.
It's Your Destiny
 
The Exotic
 
Ice Breaker
Ice Breaker fires single high-velocity shots instead of shotgun spreads, and slowly regenerates ammo over time. The Exotic's rockets split into 14 smaller rockets instead of 7.  
J am
 
Alpha Bullet
 
Omega Bullets
Reduces reload times by 33%.
Jolly Roger
 
VertebraeK-47
 
Skull Spitter
Skull Spitter fires three skulls per shot, and skulls are linked like VertebraeK-47 shots. VertebraeK-47 can freeze enemies.
Jotun Time
 
Frost Giant
 
Heart of Ice
Reloading chills and freezes nearby enemies. Thrown guns deal 180% more damage.
Jumping... Is Useless
 
Quad Laser
 
Moonscraper
Quad Laser shots fire four continuous lasers in a cross formation as they travel. Doubles Quad Laser's shot speed and triples its reload time.
Junk Mail
 
Mailbox
 
Magazine Rack
Mailbox only shoots packages while Magazine Rack is active.
Just In Case
 
Lower Case r
 
Bomb
Lower Case r becomes a capital letter R and transforms into a one shot rocket launcher. It fires the word ROCKET with cloud sprites when shot, and creates a cartoony BOOM cloud when it hits something.  
Just Like The Real Thing  
Shotgrub
One of the following:
 
Sixth Chamber
 
Yellow Chamber
 
Holey Grail
 
Bullet Idol
Shotgrub fires a wide spread of five bullets, which bounce back and split into waving bullets after hitting a wall, similar to the Shotgrub enemy's attack.
Just Shoot Me
 
Camera
 
Magazine Rack
Magazine Rack shoots at nearby enemies while it is active and Camera is held.
Kage Bunshin
 
Shadow Bullets
 
Decoy
Using Decoy spawns a shadow clone of the player that mirrors their movements and fires towards the crosshair whenever the player fires.
Kaliber k'pow uboom k'bhang  
High Kaliber
One of the following:
 
Holey Grail
 
Cursed Bullets
 
Yellow Chamber
The split soul initially moves towards the player instead of away.
Kaliber's Grip  
Abyssal Tentacle
One of the following:
 
Chaos Bullets
 
Holey Grail
 
Yellow Chamber
Abyssal Tentacle grabs two enemies at a time.  
Kalibreath  
Dragunfire
One of the following:
 
Yellow Chamber
 
Holey Grail
Dragunfire turns grey and has an increased rate of fire.  
Keep The Change
 
M16
 
Blank Companion's Ring
Blank Companion's Ring will sometimes activate when M16 empties its magazine.
Keeping The Beat
 
Metronome
 
Drum Clip
Metronome grants +4% damage per kill instead of +2%, and maxes out at +250% damage instead of +150%. Metronome's icon color goes from red to purple to grey instead of ending at red.
Key Witness
 
Master of Unlocking
 
Shelleton Key
Occasionally fires an AKEY-47 shot whenever the player fires a gun.
The Killing Joke
 
AK-47
 
JK-47
The guns are dual-wielded.
King Bomber  
Lil' Bomber
One of the following:
 
Gilded Bullets
 
Coin Crown
 
Crown of Guns
Lil' Bomber's bombs become gold and spawn   every time they hit an enemy.  
Kinjutsu
 
Decoy
 
Shadow Clone
Shadow Clone spawns three clones.
Klobbering Time  
Klobbe
One of the following:
 
AU Gun
 
Moonscraper
Klobbe is doubled.  
Knight Time
 
Ballistic Boots
 
Gunknight Greaves
Taking damage will briefly stop time.
Kung Fu Hippie, Rappin' Surfer
 
Rad Gun
 
Sunglasses
Increases Rad Gun's magazine size to 20, and decreases its reload speed, giving more time to hit the mark. Also grants 1.33 coolness, makes the skateboard pink, and turns the hat backwards.  
Land Among The Stars
 
Moonscraper
 
Crescent Crossbow
Killing enemies with Moonscraper has a chance to send out three planets, which damage enemies and start orbiting the player if they fail to hit an enemy.
Laser Light Show
 
Laser Rifle
 
Scattershot
Laser Rifle becomes blue and gold, and fires 3 sets of 3 shots in a spread per trigger pull. Each shot bounces once.  
Liches Get Stitches
 
Riddle of Lead
 
Lichy Trigger Finger
Grants a large attack speed increase for a short duration after an enemy is killed.
Like Shooting Fish
 
Barrel
 
Backup Gun
A fish pops out of the barrel and fires bullets. The last shot of each magazine fires a fish that flops around on the ground and fires at enemies.  
The Line Of Fire  
Composite Gun
One of the following:
 
Full Metal Jacket
 
Pig
 
Sunglasses
Composite Gun shots leave a trail of fire.
Lotus Bloom  
Laser Lotus
One of the following:
 
Rolling Eye
 
Shock Rounds
Laser Lotus gains the appearance of a flower. Its magazine size increases to 32, its maximum ammo increases to 250, its fire rate greatly increases, and it deals half damage.  
Love/Hate
 
Shotgun Full of Hate
 
Shotgun Full of Love
The guns are dual-wielded.
Lumberjacked
 
Huntsman
 
Mahoguny
Increases the damage of the guns by 25%.
M1 Multi-Tool  
M1
One of the following:
 
Drum Clip
 
Scope
 
Ammo Belt
 
Backpack
 
Utility Belt
Decreases M1's reload time by 20% and increases its magazine size, and maximum ammo. Increases movement speed. Changes appearance to resemble an M14.  
Mad Cats
 
3rd Party Controller
 
Cat Bullet King Throne
The bullets shot from Cat Bullet King Throne home in on enemies.
Magazine Clips
 
Drum Clip
 
Magazine Rack
Magazine Rack's radius doubles.
Mak Pak  
Makarov
One of the following:
 
Bottle
 
Backpack
Increases Makarov's maximum ammo by 30%. While holding Marakov, it occasionally fires a homing bullet at an enemy for free.
Mass Cutter
 
Mass Shotgun
 
Mine Cutter
Whenever a Mass Shotgun shot splits, a cone of Mine Cutter lasers is fired.
Massive Effect  
Mass Shotgun
One of the following:
 
Stout Bullets
 
Fat Bullets
 
Heavy Bullets
Significantly increases the size of Mass Shotgun's shots.
Master's Chambers  
Chamber Gun
One of the following:
 
Master Round I
 
Master Round II
 
Master Round III
 
Master Round IV
 
Master Round V
Each Master Round the player carries permanently unlocks the mode of its respective floor for Chamber Gun. Reloading the gun with a full magazine cycles through the unlocked modes.
Maximize Spell  
Flame Hand
One of the following:
 
Chance Bullets
 
Gungeon Pepper
Flame Hand becomes green and creates pools of green fire. Green fire does not damage the player, and enemies that touch green fire are permanently aflame.  
Max Pane  
Glass Cannon
 
Glass Guon Stone
If hit, Glass Guon Stone breaks, but Glass Cannon retains its ammo.
Meltdown
 
Gamma Ray
 
Big Boy
Gamma Ray branches twice to form a spread of 5 beams. Using Big Boy refills 100 Gamma Ray ammo.
Mine Craft
 
Mine Cutter
 
Cluster Mine
Mines created by Cluster Mine home in on enemies.
Mirror Shield
 
Shield of the Maiden
 
Rolling Eye
Shield of the Maiden reflects enemy bullets while active.  
MM6 Mini Rocket
 
Jetpack
 
Backpack
Activating Jetpack fires a rocket in the direction of the crosshair. This has an approximate 5 second cooldown.
Mmmmmmmmm MMMMmm!
 
M1
 
M16
 
M1911
Increases the damage, maximum ammo, and rate of fire of the guns by 25%.
Monsters and Monocles
 
Teapot
 
Mustache
Increases the ignition range of Teapot's reload effect.
Moonplanet
 
Mr. Accretion Jr.
 
Moonscraper
A moon orbits the player that blocks enemy shots.  
Mr. Shadow
 
Zorgun
 
Shadow Bullets
Zorgun Shadow Bullets become the random explosives Zorgun fires as its last shot.
Monster Grub
 
Shotgrub
 
Monster Blood
Shotgrub reloads faster and its bullets gain homing.
Nailed It!  
Nail Gun
One of the following:
 
Heavy Bullets
 
+1 Bullets
 
Sunglasses
 
Blast Helmet
 
H4mmer
 
Cobalt Hammer
Nails deal triple damage.  
Napalm B
 
Mega Douser
 
Napalm Strike
Mega Douser's water spreads fire instead of extinguishing it.
Natural Selection  
Evolver
One of the following:
 
Big Boy
 
Irradiated Lead
 
Monster Blood
Evolver evolves after every 3 unique enemy types killed instead of 5.
Needless Acrimony  
Shotgun Full of Hate
One of the following:
 
Angry Bullets
 
Table Tech Rage
Rage duration is greatly increased if a table is flipped while Shotgun Full of Hate is held.
Neo Tech, Yo  
Mutation
One of the following:
 
Bionic Leg
 
Shock Rounds
Mutation's beam turns blue and creates electrified water. The player is immune to electricity while Mutation is held.  
No Odd Job
 
Makarov
 
Klobbe
The guns are dual-wielded. Increases damage by 20% and spread by 60%, decreasing accuracy.
Not Quite As Mini  
Vulcan Cannon
One of the following:
 
Ammo Belt
 
Drum Clip
 
Oiled Cylinder
Increases Vulcan Cannon's maximum ammo by 25% and significantly increases fire rate.  
Not So Sawed-Off  
Buzzkill
One of the following:
 
Rattler
 
Regular Shotgun
 
Winchester
Buzzkill's saw blades are linked by lightning.  
Noxin Cannon  
Luxin Cannon
One of the following:
 
Shadow Bullets
 
Cursed Bullets
Luxin Cannon and its shots turn grey, and the lasers deal 25% more damage.  
One Fish Two Fish
 
Barrel
 
Helix Bullets
With each shot, Barrel fires a normal blue fish and a red fish that sets enemies on fire.
Oranger Guon Stone  
Orange Guon Stone
One of the following:
 
+1 Bullets
 
Orange
 
Amulet of the Pit Lord
Orange Guon Stone grows in size, fires more frequently, and deals more damage.
Orrery
 
Mr. Accretion Jr.
 
Orbital Bullets
Planets fired by Mr. Accretion Jr. have smaller bullets orbiting them like moons; these bullets persist when the missed shots start orbiting the player.
Outer Limits
 
Mr. Accretion Jr.
 
Singularity
Firing three planets into Singularity's black hole causes it to explode and deal 100 damage to all enemies in the room.
Over Dose
 
Heavy Bullets
 
Devolver
Heavy Bullets no longer decreases shot speed.
Paperwork  
Origuni
One of the following:
 
Ballot
 
Table Tech Blanks
 
Table Tech Heat
 
Table Tech Money
 
Table Tech Rage
 
Table Tech Rocket
 
Table Tech Shotgun
 
Table Tech Sight

 
Table Tech Stun

The first shot after reloading Origuni fires three planes.
Paper Lanterns
 
Balloon Gun
 
Origuni
While holding either gun in a room with enemies, paper lanterns periodically spawn, which drift towards enemies and deal damage.
Pandemic Pistol  
Plague Pistol
One of the following:
 
Monster Blood
 
Gundromeda Strain
 
Irradiated Lead
Plague Pistol bullets bounce and are connected with electricity.  
Parchmental
 
Origuni
 
Map
Each Origuni shot fires two maps.  
Particle Accelerator
 
Particulator
 
Laser Sight
Whenever a smaller bullet hits an enemy, a laser is automatically fired in its direction.
Particle Flow  
Laser Sight
One of the following:
 
RPG
 
Stinger
 
Zorgun
 
Laser Lotus
The guns home in on enemies.
Pea Cannon  
Pea Shooter
One of the following:
 
Old Knight's Helm
 
Old Knight's Shield
 
Mahoguny
 
Starpew
 
Crutch
 
Broccoli
 
Cactus
 
Wood Beam
Pea Shooter shots become larger, deal more damage, and explode.  
Peripheral Vision  
Light Gun
One of the following:
 
Wax Wings
 
Laser Sight
Upon hitting an enemy 3 times with Light Gun, a dog appears and attacks that enemy.  
Phoenix Up  
Phoenix
One of the following:
 
Unfinished Gun
 
The Scrambler
 
Hot Lead
 
Copper Ammolet
 
Flame Hand
 
Weird Egg
 
Napalm Strike
 
Gungeon Pepper
Changes the look of Phoenix and summons a Phoenix companion that fires at enemies.   
Pilot Wingsman
 
Alien Engine
 
Wingman
Wingman fires four rockets at a time.  
Pinker Guon Stone  
Pink Guon Stone
One of the following:
 
+1 Bullets
 
Charmed Bow
 
Amulet of the Pit Lord
Enemies that damage the player become temporarily charmed.
Pistol Machine  
Machine Pistol
One of the following:
 
Fortune's Favor
 
Laser Sight
 
Nanomachines
 
Bionic Leg
 
Shock Rounds
 
+1 Bullets
Machine Pistol shots gain the effect of Angry Bullets and are connected with electricity.  
Pitch Perfect  
Pitchfork
One of the following:
 
Sixth Chamber
 
Yellow Chamber
 
Holey Grail
Pitchfork fires green fireballs, setting enemies permanently aflame.  
Plant Power
 
Triple Gun
 
Broccoli
Triple Gun reaches its laser beam phase earlier.
Plasma Beam
 
Heroine
 
Hot Lead
Enables Plasma Beam mode, which fires a fire laser when uncharged and a large piercing fire projectile when charged. Modes can be switched by reloading Heroine with a full magazine.  
Porkulent
 
Pig
 
Ring of Miserly Protection
Allows the player to make purchases without losing the Ring.
Poseigun
 
Trident
 
Crown of Guns
Trident fires a spread of three beams per shot, no longer benefits from rolling, has its magazine size increased to 8, and has its fire rate reduced greatly. Crown of Guns randomly fires Trident beams.
Powerhouse of the Cell
 
Evolver
 
Antibody
Evolver evolves one stage.
Praise the Gun
 
Gun Soul
 
Old Knight's Flask
Dodge roll recovery time is reduced. A bonfire spawns in every Shop and elevator to the next floor. If the player dies, they will respawn at the last bonfire they activated instead of at the start of the floor.
Pretty Good  
SAA
One of the following:
 
Box
 
Ration
 
Fortune's Favor
 
Nanomachines

 
Hip Holster

Increases coolness by 2.
Primitive Shapes
 
Quad Laser
 
Tangler
Tangler's shots become much larger and deal 50% more damage, but travel very slowly. Quad Laser's shots become rectangles and travel faster.
Production Model  
Prototype Railgun
One of the following:
 
Teleporter Prototype
 
Nanomachines
Prototype Railgun shots bounce up to 5 times.
Pulp Gungeon
 
M1911
 
Orange
A copy of M1911 orbits the player and fires whenever the player fires.
Queen of Hearts
 
Heart Purse
 
Coin Crown
When at full health, picking up hearts will turn them to coins.
Quick and the Gundead
 
Hip Holster
 
Heart Holster
Shots fired by Hip Holster home in on enemies.
RAIDEN
 
Raiden Coil
 
Space Friend
Increases Raiden Coil's max ammo capacity by 25%. Pairs of bullets are fired alongside the laser. Massively reduces ammo consumption.  
Raizo's Stuff
 
Bloodied Scarf
 
Grappling Hook
Bullets shot while being pulled with Grappling Hook gain homing.
Recycling Bin
 
Starpew
 
Trashcannon
Trashcannon becomes a recycling bin with higher damage and a larger magazine size, and no longer creates poison projectiles.  
The Red Hood
 
Huntsman
 
Wolf
While Huntsman is held, Wolf's attacks will significantly weaken enemies.
Redder Guon Stone  
Red Guon Stone
One of the following:
 
+1 Bullets
 
Ring of Fire Resistance
 
Amulet of the Pit Lord
Red Guon Stone's size is increased. Player will gain a yellow glow and stat increase similar to that of Macho Brace for a short time whenever Red Guon Stone blocks a bullet.
Regular Old Guns
 
AK-47
 
Regular Shotgun
Quadruples the guns' rate of fire but decreases their damage by 25%.
Reload Roll  
Easy Reload Bullets
One of the following:
 
Magnum
 
M1911
 
Dungeon Eagle
 
38 Special
 
Colt 1851
 
Makarov
 
SAA
Rolling reloads six bullets.
Relodestar  
Relodestone
One of the following:
 
Chaos Ammolet
 
Copper Ammolet
 
Frost Ammolet
 
Gold Ammolet
 
Lodestone Ammolet
 
Uranium Ammolet
After Relodestone's effect ends, the bullets that were absorbed are shot out of the player dealing damage to enemies.
Resourceful Indeed
 
Elimentaler
 
Resourceful Sack
 
Partially-Eaten Cheese
 
Rat Boots
Player becomes the Resourceful Rat. This prevents items from being stolen when they're left behind in rooms.
Revolution
 
Dueling Pistol
 
Ballot
Increases the damage of Dueling Pistol by 25%, and allows its bullets to bounce five times instead of twice.
Rubenstein's Monster
 
RUBE-ADYNE Prototype
 
RUBE-ADYNE MK.II
The two guns are combined to form Rubenstein's Monster.  
Ruby Carbine  
Hegemony Carbine
One of the following:
 
Ruby Bracelet
 
Cog of Battle
 
Mimic Tooth Necklace
Hegemony Carbine shots light enemies on fire and bounce.  
Ruby Weapon
 
Omega Bullets
 
Hot Lead
The last shot of each magazine is guaranteed to be a fire bullet.
Running Blades
 
Deck4rd
 
Knife Shield
Killing an enemy with Deck4rd has a high chance to spawn a Knife Shield knife.
Rabid
 
Lower Case r
 
Angry Bullets
Lower Case r spells out LOSER, DORK, CHUMP, NOODLE, and TAFFER.
Radiant
 
Lower Case r
 
Silver Bullets
Lower Case r spells out SILVER, BLESSED, and WEREWOLF.
Ravishing
 
Lower Case r
 
Charming Rounds
Lower Case r spells out HANDSOME, CHARM, and CUTE.
Reactive
 
Lower Case r
 
Explosive Rounds
Lower Case r spells ROCKET, BOOM, KABOOM, and POW when fired and rounds explode.
Reanimate
 
Lower Case r
 
Ghost Bullets
Lower Case r spells out SPOOKY, GHOST, and BOO.
Reinforced
 
Lower Case r
 
+1 Bullets
Lower Case r spells out BULLET+1.
Remnant
 
Lower Case r
 
Omega Bullets
When firing Lower Case r, adds an omega letter after each BULLET.
Replete
 
Lower Case r
 
Finished Gun
Lower Case r spells out COWABUNGA, BOOYAKASHA, THANK YOU, THANKS, HASTA LA VISTA, TOODLES, GOODBYE, FAREWELL and GAME OVER.
Research
 
Lower Case r
 
Book of Chest Anatomy
Lower Case r spells out CHEST and MIMIC.

Can be used to open locked chests.

Resplendent
 
Lower Case r
 
Gilded Bullets
Lower Case r spells out CASH, COINS, SHELLS, and GOLD.
Root
 
Lower Case r
 
Alpha Bullet
When firing Lower Case r, adds an alpha letter before each BULLET.
Runic
 
Lower Case r
 
Magic Bullets
Lower Case r spells out ABRA and KADABRA.
Sausage and Peppers
 
Gungeon Pepper
 
Meatbun
Significantly increases the radius of Gungeon Pepper's damaging aura, and Meatbun heals five hearts.
Saved the Best for Last
 
Hip Holster
 
Ruby Bracelet
Shots fired by Hip Holster explode.
Savior of the Universe
 
Flash Ray
 
Camera
Flash Ray's shots gain unlimited piercing, a thicker beam, one bounce, and increased fire rate. When reloaded from an empty clip, Flash Ray produces a flash that hits all enemies in the room, like Camera. Camera fires 2 laser beams when fired.  
Second Accident  
Shotbow
One of the following:
 
Teleporter Prototype
 
Chest Teleporter
Shotbow fires 9 parallel arrows straight forward.  
Secret Twin
 
Vulcan Cannon
 
Ticket
Holding Vulcan Cannon and using Ticket spawns two friendly Gatling Gulls instead of one.
Serious Sam Publishing Contract
 
Devolver
 
Serious Cannon
Alongside the standard cannonball, Serious Cannon fires a screaming man who chases enemies and explodes on contact. Serious Cannon also gains a chance to "Devolve" enemies.
Shadow Warrior
 
Zilla Shotgun
 
Yari Launcher
A Demon Head orbits the player while they have one of the guns held. When they reload one of them, the orbiting Demon Head fires at nearby enemies. Reduces the guns' spread by 60%, increasing their accuracy.
Shell-A-Ton
 
Baby Good Shelleton
 
Shelleton Key
Baby Good Shelleton moves and shoots much faster.
Shield Night
 
Knight's Gun
 
Shield of the Maiden
Reloading Knight's Gun places a shield, similar to Betrayer's Shield.
Shot Across The Bow  
Gunbow
One of the following:
 
Rocket-Powered Bullets
 
Air Strike
 
iBomb Companion App
 
Explosive Rounds
Gunbow fires explosive missiles.  
Shotgun Affinity
 
Shotga Cola
 
Shotgun Coffee
All shotgun-type weapons gain piercing, increased knockback, and increased shot speed.
Shredder  
Metronome
One of the following:
 
Face Melter
 
Gunzheng
Doubles the spread of the guns, decreasing their accuracy.
Siren Sidearm
 
Siren
 
Barrel
The first shot of every Siren magazine fires two fish. Every Barrel shot fires a Siren water bubble.
Slings and Arrows
 
Bow
 
Sling
Bow can be charged longer to fire a special arrow that deals 50 damage.
Sleuth Out
 
38 Special
 
Scope
While held, decreases enemy projectile speed by 20%, but decreases 38 Special's rate of fire by 20%.
Smart Bombs One of the following:
 
Bomb
 
Ice Bomb
One of the following:
 
Crutch
 
Homing Bullets
Bombs home in on enemies.
Smile, you son of a...
 
Compressed Air Tank
 
M1
Compressed Air Tank's sharks will explode upon biting an enemy. These explosions can damage the player.
Snicker-snack
 
Excaliber
 
Vorpal Bullets
Excaliber fires a spread of 3 homing shots that deal 20% less damage.
Sniper Woof  
Wolf
One of the following:
 
A.W.P.
 
Sniper Rifle
 
Hexagun
 
M1

 
Bow

Reduces reload times of the guns by 30%. Standing still for a short time (around 1-2 seconds) causes the player to glow yellow, increasing the damage of the guns by 50%. This effect persists until the player switches weapons or moves. Sniper Shells and Professionals are permanently charmed.
Snowball Shotgun
 
Snowballer
 
Snowballets
Snowballer fires multiple snowballs at once in a shotgun spread with lowered rate of fire.  
Soft Air
 
JK-47
 
Sponge
When holding JK-47, the player regains ammo when walking over liquids. Increases range that reloading causes fear.
Softshell
 
Brick Breaker
 
Stuffed Star
While Stuffed Star is active, Brick Breaker shells are continually fired in random directions.
Solar Flare
 
Mr. Accretion Jr.
 
Flare Gun
Flare Gun pierces enemies and explodes when hitting a wall.
some even larger number
 
Quad Laser
 
Triple Gun
Killing an enemy with Triple Gun shoots a Quad Laser bullet from where the enemy died.
Space Best Friend
 
Alien Engine
 
Space Friend
Space Friend fires at a much faster rate.  
Spartan Loadout
 
Alien Sidearm
 
Cat Claw
Cat Claw pierces enemies, attaching its explosive to every enemy hit. Alien Sidearm can be charged twice to fire a more powerful shot.
Special Delivery  
Owl
One of the following:
 
Bundle of Wands
 
Witch Pistol
 
Hexagun
 
Staff of Firepower
Makes the guns' shots bounce. Owl becomes skeletal in appearance and fires bouncing, letter-shaped bullets.  
Special Reserve  
Molotov Launcher
One of the following:
 
Hot Lead
 
Napalm Strike
 
Double Vision
Molotovs create green fire pools. Green fire does not damage the player, and enemies that touch green fire are permanently aflame.  
Spelunker
 
Blast Helmet
 
Gunboots
Replaces the bullet spread of Gunboots with a short-ranged explosion.
Spicy D-Boys
 
Strafe Gun
 
Sunglasses
Increases coolness by 2. Lights nearby enemies on fire while reloading Strafe Gun.
Spengbab
 
Tangler
 
Sponge
Increases the knockback and range of Tangler by 50%.
Square Brace  
Polaris
One of the following:
 
Bracket Key
 
Bionic Leg
Increases Polaris ammo capacity to 700, increases its magazine size to 30, increases damage by 20%, increases fire rate when leveled up, and changes its appearance.  
Star Friends
 
Polaris
 
Stuffed Star
While Stuffed Star is active, the player continually fires maximum level Polaris shots in all directions.
Starburst Fire
 
Laser Rifle
 
The Emperor
Firing once with either weapon rapidly fires its entire magazine. Increases damage by 20% and doubles fire rate.
Steel Skin
 
AC-15
 
Nanomachines
AC-15 will remain in its powered-up form even if the player has no armor.
The Submachinist
 
MAC10
 
Machine Pistol
The guns are dual-wielded.
Succulent DOOM
 
Cactus
 
Starpew
Every Cactus shot fires a spread of 5 needles.
Super Bomberpal
 
Ice Bomb
 
Lil' Bomber
Lil' Bomber fires two bombs instead of one, charges twice as fast, and has 20% lower reload time.
Super Serum One of the following:
 
Plague Pistol
 
Plunger
One of the following:
 
Gas Mask
 
Hazmat Suit
Increases the magazine size of the guns by 50%, increases the size of their projectiles, and allows them to bounce once.
Super Space Turtle DX
 
Super Space Turtle
 
Yellow Chamber
Super Space Turtle becomes jammed, firing piercing shots with higher damage.  
Sweetness and Light
 
Magic Lamp
 
Magic Sweet
Magic Lamp gains triple shot. Each shot deals 25% of the normal damage, but the genie deals full damage.
Swift Sloop
 
Corsair
 
Sense of Direction
Increases Corsair's shot speed by 50%, decreases its charge time by 33%, and decreases its reload time by 20%.
Synthetic Shield Two of the following:
 
Heart Synthesizer
 
Ammo Synthesizer
 
Armor Synthesizer
Creates a companion that orbits the player and blocks shots. If the player has two of the three synthesizers, the companion will take the appearance of the third synthesizer. If the player has all three synthesizers, all three companions will spawn.
Tea for Two  
Teapot
One of the following:
 
Ser Junkan
 
Wolf
 
Turkey
 
Clown Mask
 
Chicken Flute
 
Baby Good Mimic
 
Badge
 
Pig
 
R2G2
 
Baby Good Shelleton
 
Super Space Turtle
 
Blank Companion's Ring
When reloading Teapot, a red aura appears around companions. Every enemy in this aura will be ignited.
Tears of Blood
 
Tear Jerker
 
Bloody Eye
Tear Jerker's tears turn red and inflict slow.
Telefrag
 
Chest Teleporter
 
Teleporter Prototype
If Teleporter Prototype teleports the player to a room with enemies, all enemies in the room will be killed instantly. If it teleports the player to a special room, Teleporter Prototype's cooldown is decreased.
Terminated, Too
 
Grenade Launcher
 
Potion of Lead Skin
Grenade Launcher's grenades fire 8 bullets in all directions upon exploding.
that &^#$# 'pizza'
 
Machine Fist
 
RPG
RPG now fires remote-controlled explosive fists, just like Machine Fist. Machine Fist's bullets also bounce twice.
The Elephant in the Room  
Elephant Gun
One of the following:
 
Pig
 
Turkey
 
Owl
 
Chicken Flute
 
Super Space Turtle
Elephant Gun becomes an elephant head and shoots elephants instead of bullets.  
The Return  
Pig
One of the following:
 
Luxin Cannon
 
Makeshift Cannon
 
T-Shirt Cannon
 
Science Cannon
 
Serious Cannon
 
Pulse Cannon
 
Vulcan Cannon
 
Trashcannon
 
Poxcannon
Pig fires bats and gains a green appearance.  
There Is Only War
 
Demon Head
 
Jolter
Reloading Jolter causes Demon Head to fire a beam at nearby enemies.
Thermal Imaging
 
The Predator
 
Sunglasses
The Predator fires two lasers instead of one.
Thorn Bath, ooh!  
Armor of Thorns
One of the following:
 
Nail Gun
 
Cactus
 
Derringer
While one of the guns is held, nails are periodically fired in all directions.
Three Part Harmony
 
Really Special Lute
 
Metronome
Really Special Lute's spread is drastically decreased.
Three Sheets
 
Balloon Gun
 
Corsair
Increases movement speed, doubles the damage of the guns, and increases their bullet speed by 20%.
Throw All Daggers
 
Excaliber
 
Knife Shield
Knife Shield generates two layers of knives upon use.
Thrown For A Bloop
 
Blooper
 
Bullet Time
While Bullet Time is active, a Blooper orbits the player and continually fires at enemies.
Tile Match  
Tetrominator
One of the following:
 
Blue Guon Stone
 
Clear Guon Stone
 
Green Guon Stone
 
Orange Guon Stone
 
Pink Guon Stone
 
Red Guon Stone
 
White Guon Stone
When the player fires Tetrominator, each Guon Stone has a chance to shoot a Tetromino corresponding to the type of Guon Stone.
To Serve Android  
Badge
One of the following:
 
Full Metal Jacket
 
Mass Shotgun
 
The Judge
 
Bionic Leg
 
Deck4rd
 
Grasschopper
Police Officer turns into a robot and becomes unkillable.  
Trigger Twins
 
Shades's Revolver
 
Smiley's Revolver
The guns are dual-wielded. All guns have double ammo capacity and 50% larger magazine size.
Triple Jump
 
Ballistic Boots
 
Springheel Boots
Grants three consecutive dodge rolls.
Triple Sticky
 
Triple Crossbow
 
Sticky Crossbow
Sticky Crossbow fires three bolts per shot and its magazine size increases from 5 to 6. Triple Crossbow's triple shot explodes upon hitting an enemy.
 
Portable Turret
 
Chance Bullets
Portable Turret will sometimes fire shots from guns in the player's inventory.
Turtle Solutions
 
Super Space Turtle
 
Turtle Problem
Each room clear spawns another Super Space Turtle, up to a maximum of 4.
Tutorialized
 
Old Knight's Helm
 
Old Knight's Shield
A shield orbits the player, blocking enemy bullets.
Twin Snakes
 
Rattler
 
Snakemaker
Rattler fires a spread of poison beams instead of bullets and Snakemaker fires homing shots.
Two Eggs Over Easy
 
The Scrambler
 
Weird Egg
The Scrambler's homing shots will cause poison.
Two Heavy
 
Crown of Guns
 
Coin Crown
Doubles the chance for Coin Crown to spawn money upon completing a room.
Two Kinds of People
 
Knight's Gun
 
Colt 1851
Improves the items and pickups dug up by Knight's Gun.
Unbelievably Charming One of the following:
 
Charmed Bow
 
Shotgun Full of Love
One of the following:
 
Charming Rounds
 
Pink Guon Stone
All of the shots fired by Charmed Bow/Shotgun Full of Love are guaranteed to charm enemies. In addition, the player is followed by a fairy that blocks bullets and displays the contents of chests.  
Unsinkable
 
Corsair
 
Glacier
Corsair fires exploding Titanic ships.
Usurper
 
Crown of Guns
 
Cat Bullet King Throne
Crown of Guns fires more bullets, and Cat Bullet King Throne fires full-sized bullets instead of mini-bullets.
Vegetables  
Broccoli
One of the following:
 
Pea Shooter
 
Cactus
Shots from the guns deal triple damage, are doubled in size, pierce enemies, and bounce off of obstacles.
Venom Veins  
Mutation
One of the following:
 
Monster Blood
 
Bloody Eye
 
Bloody 9mm
 
Bloodied Scarf

 
Blood Brooch

Gives Mutation poison effect.
The Void Corps Two of the following:


 
Void Shotgun
 
Void Core Assault Rifle
 
Void Core Cannon
When one of the guns is held, the other(s) orbit the player. Whenever the player reloads, the orbiting gun(s) fire towards the crosshair.
Vulcan Raving
 
Vulcan Cannon
 
Wax Wings
Increases knockback by 50%.
Wave Beam
 
Heroine
 
Shock Rounds
Enables Wave Beam mode, which fires two wavy projectiles connected by electricity when uncharged, and a standard large Heroine shot when charged. Modes can be switched by reloading Heroine with a full magazine.  
Weird Science
 
Disintegrator
 
Science Cannon
Three Science Cannon beams branch off perpendicular to Disintegrator's main beam.
Well Dressed
 
Poxcannon
 
T-Shirt Cannon
Both guns fire explosive wardrobes at the end of their magazines.
Whale of a Time
 
GuNNER
 
Backpack
Also has a chance to spawn a healing skull if a weapon other than GuNNER is equipped when the player takes damage.
What A Thrill  
Patriot
One of the following:
 
Ration
 
Cigarettes
 
Fortune's Favor
 
Ancient Hero's Bandana
 
Box
Patriot has a chance to transmogrify enemies into snakes.
what engine do you use
 
Gungine
 
Unity
Gungine fires a spread of three bullets per shot, but fires at 1/5th of its original speed.
Whiter Guon Stone  
White Guon Stone
One of the following:
 
+1 Bullets
 
Flash Ray
 
Amulet of the Pit Lord
Increases the size of White Guon Stone.

If the player has Daruma, its cooldown is halved.

Why's Bullet Crying?
 
Cold 45
 
Frost Giant
Attacking a frozen enemy with one of the guns causes a yeti to attack it, dealing high damage.
Wicked Sister  
Magnum
One of the following:
 
Lies
 
Briefcase of Cash
Magnum gains a bayonet that blocks bullets when reloading, similar to Huntsman.  
Willing To Sacrifice  
Freeze Ray
One of the following:
 
Ice Cube
 
Heart of Ice
 
Frost Bullets
Freeze Ray gains piercing and slowly regenerates ammo over time.
Worlds of Guncraft
 
Mr. Accretion Jr.
 
Gunderfury
Gunderfury will occasionally fire Mr. Accretion Jr. shots.
Wound Up
 
Wind Up Gun
 
Oiled Cylinder
The damage and piercing of Wind Up Gun never decreases. Increases damage and bullet size by 25%.
Wrath Of The Blam
 
Tear Jerker
 
Directional Pad
Tear Jerker is replaced with a crying bullet head that can only fire in cardinal directions, but deals double damage.  
y cant u crawl
 
Heroine
 
Roll Bomb
While Heroine is equipped, increases the size of Roll Bomb's explosions.
\o/  
Sunlight Javelin
One of the following:
 
Gun Soul
 
Old Knight's Flask
When Sunlight Javelin kills an enemy, it will spawn a circular zone that ignites all enemies within it.
 
Klobbe
 
Cog of Battle
In addition to its standard bonuses, upon successfully activating an active reload, Cog of Battle multiplies Klobbe's damage and knockback by 10 and removes all spread for a random portion of the current magazine.

This is a hidden synergy. It doesn't have a name and the blue arrow won't appear.