You have to fight with robots, both small and huge; hide from powerful energy emissions; kill the zombies in a underground; tu off the generators and save the world.
Also in the game, after the passage of the main campaign, available second game mode, which is called “Derby”, in which you control a huge robot, and your goal – to destroy all the other robots.
The world Z.I.O.N. a lot of hiding places in which you can find as in-game items, such as a music player or a box with a thousand rounds of ammunition, and outside the game, such as steam- keys from the other games.