In the single-player mode of "Quake," the player has to get to the end of each level. The player will usually have to find keys or switches to open all the locked doors before they can get to the exit of a level. They will also have to fight lots of monsters that try to kill the player. There are also secret areas and secret levels that the player can find. Secret areas will usually have something that helps the player win the level, like extra health or ammo. The player always has two weapons: the axe and the shotgun. More weapons can be found in the levels, including the nailgun, super nailgun, super shotgun, grenade launcher, rocket launcher, and the thunderbolt.