The Force-A-Nature is an unlockable weapon for the Scout class when the player has completed at least ten Scout achievements.
The gun has a knock back ability that applies to both yourself and enemies. Firing the gun knocks you back a little, and any enemy hit by the shot will also be knocked back a little. It can be used during a jump to effectively give the Scout a third jump. It also fires twice as fast as the Scattergun. However, there are only two shots per clip, so there will be a lot of reloading.