File:Quake1.gif The Backpack is a special type of ammo pickup that is dropped by Monsters or fragged players in Quake. It is brown and rotates slowly above the surface. Backpack contents depend on the actor that dropped it. Unlike other forms of Ammo, the Backpack will disappear if it is not collected within 2 minutes. As it is designed to disappear after a length of time, the Backpack only spawns when a particular entity is killed and is never found independently of the entity. Likewise, any player can pick up a Backpack whether their ammunition is full or not, in contrast to other forms of Ammo.