Motion tracker device simulation - with a twist. Along with motion of aliens, this motion tracker detects projectile trajectories, hits on target, transmitters from the colonists, and sudden changes in temperature. Luckily, it has button linked to trigger on your pulse rifle, so you can use it to aim and shoot. Also, there is a fire selector switch to choose between single, auto, flame, or grenade fire modes. You can tilt your device to turn and aim, or choose turret mode to access on screen tur