Find a safe place in a devastated environment on the Earth that has been taken over by aliens. You are the sole survivor of a car crash and have lost all your equipment except for a combat knife and a few gas mask filters. You can eat food rations to replenish health. Reload your weapon often so you don't get caught with an empty clip. Finding other survivors gives you valuable companions. Earth's air has been poisoned and you need a gas mask when venturing outside.
Arrow keys - move
Spacebar - interact
A - shoot
S - jump / let go
R - reload
Q - switch weapons
E - eat a food ration
P - pause