Shoot your way through a zombie infested bio-research facility and find out what went wrong.
To pass through each room, pick up a keycard then exit through the door on top.
Use arrow keys or W,A,S,D to move your player.
Aim/turn with mouse / Left click to shoot / Hold left mouse button for continuous fire.
Available weapons are listed at the bottom; press key #2 to switch to a sonic shell, key #3 for shockwave
key #1 to load standard ammo.