Game full of action and good graphics. Arm yourself with a variety of weapons, equipment and skills to fight alien forces and save the human race. First you can only play with humans but if you get past all the screens go with the aliens.
Movement - WASD/Arrow Keys (or Space to jump) Aiming/Shooting - Mouse
Next/Previous Weapon - Q/E or Shift/Enter Select specific weapon - Number keys
Use Ability - F/Ctrl
Pause - Esc/P