Shoot your way through 6 action packed levels and 3 unique environments. Slaughter hundreds and hundreds of crazed vicious monsters on your way to confronting the final boss. Play the game several times to unlock various achievements and special challenges.
Use WASD to move around. Numbers 0-9 to select different guns, or Mouse Wheel or Q and E to scroll through your guns. Press G to throw grenades. This game will save your progress so you can play mulitple times to build up large stocks of ammo.