In any mode, select the minigun and press [Secondary Fire]. The minigun will "warm up" and keep spinning the barrels until you press [Secondary Fire] again or switch to another weapon. While this feature is active, the minigun will fire right after pressing [Fire]; it no longer needs to "spin up" or "spin down", and will also fire more accurately. Using this technique allows you to easily wipe out the Praetorian Aliens or Assault Predators. Note: In multi-player mode, only the Corporate AT officer can use the minigun as a set weapon, and they are very uncommon weapons in a normal multi-player game.