Play to shoot zombies in a 3D environment. Fight waves of enemies with rifles and assault weapons. Complete story missions and survive boss battles. Compete in online multiplayer matches. Unlock weapons and upgrade gear.
Build and upgrade UFO commandos using collected screws. Reroll and merge units for better performance. Conduct research in a lab to enhance abilities. Assemble squads to battle supervillains and stop their world takeover plans.
Shoot enemies flying from the sky to avoid losing lives. Enemies speed up as more are defeated. Avoid collisions to survive. Restart game after losing all lives. Play with background music by Kami.
