Take on endless waves of zombies and try to survive for as long as possible in Beta Sector. You begin the game with a pistol, but will be able to unlock cooler weapons, such as a minigun, an energy beam, a railgun, and even a grenade launcher! These weapons will cost you points, which you gain after completing a wave. The number of points you earn depends on how many zombies you've killed and how much damage you've taken.