Here's a quick guide explaining how to download a free trial of Cold War Zombies on PC, Xbox and PS.
Black Ops Cold War Zombies Guides
Here's how to play Call of Duty: Black Ops Cold War Zombies mode all by yourself (single-player mode).
Pack a punch allows players to upgrade their weapons in exchange for points. Check out how to get pack a punch right here
In order to activate the machine, you will have to press X on Square or PlayStation.