“备”用枪

• Guns simultaneously shoot forwards and backwards. The backwards firing shots will be significantly less accurate.

• Gruber's Bane - If player also has [阴影子弹] all backward shots have an additional projectile.
• Like Shooting Fish - If the player has [桶枪] , a fish pops out of the [桶枪] and fires bullets. The last shot of each magazine fires fish who flop around on the ground and fire at enemies.
• Interacts strangely with Double Vision - Instead of doubling the backwards shots, a player that activates [复视药酒] with Backup Gun equipped will fire three shots forwards, and one shot backwards.
• With Backup Gun, [黑暗标志] '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 [变异手臂] and the [蝈蝈侦察机] .
• Synergizes extremely well with weapons that can bounce shots on walls or release homing projectiles such as [爬行者] , the [蜂巢] or the [月球平土机] .
• Works well with [环绕子弹] , 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 [奖品手枪] to be inaccurate. It's recommended to drop the item in the room before speaking to [温彻斯特霰弹枪] 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 [渎神] and [方正激光炮] , and weapons with very large bullets.
• With the [外星引擎] , the gun will also fire an invisible flame backwards, though recoil is not affected.
• Does not affect [复合枪] 's charged shots.
• Does not affect the [佐尔枪] 's final shot.
• The backwards shots can trigger the multi-shot effect of the Y.V. shrine .
• [机会子弹] triggers independently for forwards- and backwards-firing rounds.
• Guns that fire forwards and backwards at the same time like the [方向键] and [变脸熔炉] have their damage doubled.

• 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

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