Zombies Verruct can be purchased with map pack one. This is the first map where you have to activate a light switch to get reunited with your comrades. Also this map introduced the ability to purchase perks after the electricity is activated. In this map you can activate an electric barrier: if zombies try to run through it, they will be electrocuted. On this map you start out separated from your other two teammates. You have to activate the electricity to get together and pretty much do anything in the game. For example to open the mystery box you have to open the door to the electrical room. This room is where you activate the electricity.