Weapons can also be found randomly across the level. The trader buys and sells ammo, armor, and weapons, such as katanas, pipe bombs, flamethrowers and shotguns. In Objective mode players complete different challenges while earning in-game money, which they can spend between waves at a trader. In Killing Floor mode, the player fights waves of zombie-like specimens - or ZEDs - with each wave becoming successively more difficult, until it concludes with a battle against a 'boss' specimen called the Patriarch. Killing Floor is a first person shooter with two game modes: Killing Floor and Objective. The player fighting a swarm of specimens.
