You should know better than to remove ancient artifacts! Zombies! An undead horde's been unleashed on the world and you now need to escape this sudden Temple of Death! Pick up guns, upgrade your health, and fight your way through the armies of darkness to the cacophonous groan of ghosts and ghouls as you wind your way through the labyrinthine tunnels.
Use your mouse to aim and fire. Use WASD keys to move.