Zombies

Zombies is a twin-stick shooter in which the player fights against an endless enemy horde. While the onslaught is divided in waves (triggered by killing a certain amount of zombies), there is only a very brief pause between them. Each few waves, the player gets to choose one of four perks (more health, health regeneration, more ammo capacity, more damage, etc.). Killed zombies may leave behind ammo or health packs. Besides the standard survival mode, there is another mode called Zombie Slayer.