In "Doom", the player can carry and use many different weapons. Each have their own special features and strengths. They are your Fists, the Pistol, Shotgun, Chaingun, Rocket Launcher, Plasma Gun, BFG-9000, and Chainsaw. The player gets new weapons by finding them in the level. Most weapons can be found in more than one level. Some weapons share ammo. For example, both the Pistol and Chaingun use bullets, and the Plasma Gun and BFG both use energy cells. The player must be careful not to waste ammo because if he or she does, there may be more than one weapon that cannot be used. The Fists and Chainsaw do not have ammo limits, so the player can use them as long as they want.