Gameplay consists of players fighting through waves against Zeds. As waves pass, the enemy count, which scales with the number of players in the game, will increase and different enemy types are introduced with the final wave culminating in a boss fight. The boss character will be determined randomly upon the start of the last wave, with each boss having different strategies for defeating it. Players are equipped with melee weapons and firearms, a healing syringe, and a welder used to block passages. Random weapons, ammo, and armor can be found by exploring the level, though players have a limited amount of weight they can carry.When players kill a Zed, they earn in-game money and experience points. Achieving certain types of kills, such as a head shot, will cause the game to enter "zed time", a few seconds where all game actions for all players are slowed down, which for players can be used to carefully aim their next shot or start a different course of action. The player can take damage from the various Zeds, which can be restored using their own medical syringe on themselves or having another character use theirs, among other regenerative items.