Backup Gun
Fires backward. Another incredible use of tape in the Gungeon, this backward-facing gun has been charmed to fire in solidarity with any equipped gun.
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Description
Backup Gun is a passive item .
Effects
- Guns simultaneously shoot forwards and backwards. The backwards firing shots will be significantly less accurate.
Synergies
If player also has 
Shadow Bullets all backward shots have an additional projectile.
If the player has 
Barrel , a fish pops out of the Barrel and fires bullets. The last shot of each magazine fires fish who flop around on the ground and fire at enemies.
Notes
- Interacts strangely with Double Vision - Instead of doubling the backwards shots, a player that activates
Double Vision with Backup Gun equipped will fire three shots forwards, and one shot backwards.
- With Backup Gun,
Dark Marker 's charged shot's accuracy is decreased, which can cause it to fail as the two projectiles have a chance to miss each other.
- Negates the recoil of the
Mutation and the 
Grasschopper .
- Synergizes extremely well with weapons that can bounce shots on walls or release homing projectiles such as
The Scrambler , the 
Bee Hive or the 
Moonscraper .
- Works well with
Orbital Bullets , as shots fired backwards which would normally miss will instead orbit the player.
- For some reason, Backup Gun seems to cause the forward shot of the
Prize Pistol to be inaccurate. It's recommended to drop the item in the room before speaking to Winchester to start the game, although it's possible to drop it during the game by backing up to a wall.
- The backward shot originates from the front of the gun, in the same pixel as the forward shot.
This works well with extremely close range weapons, like
Blasphemy and 
Quad Laser , and weapons with very large bullets.
- With the
Alien Engine , the gun will also fire an invisible flame backwards, though recoil is not affected.
- Does not affect
Composite Gun 's charged shots.
- Does not affect the
Zorgun 's final shot.
- The backwards shots can trigger the multi-shot effect of the Y.V. shrine .
Chance Bullets triggers independently for forwards- and backwards-firing rounds.
- Guns that fire forwards and backwards at the same time like the
Directional Pad and 
Face Melter have their damage doubled.
Trivia
- This item is a reference to the movie Die Hard , where the protagonist John McClane tapes his Beretta 92F pistol to his back. The synergy Gruber's Bane - is a reference to the primary antagonist of the film, Hans Gruber
Unlock Method
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