Half-Life 2: Zombie Master Guineapig Map

that. Move to the safe point behind a door. There is only one spawn point for the Zombie Master which is a giant hole that catapults the zombies on a random place in a room. The Zombie Master has traps to block areas for the players like fire, poison gas or even huge moving walls.
Mad government scientists have captured you and are now using you for a research project about humans in combat situations with zombies. In this map, you have to survive for 5 minutes, and after