Shoot down never ending waves of enemy helicopters in Heli Intrusion. With your mouse aim at hostiles flying overhead. Click to shoot your mortars in their direction. The more choppers you take down the more rewards you will receive after each wave. Items like health restoration, increased machine gun speed, double bullets, rocket launcher weapon boosts, and increased rocket speed to name just a few. With more waves of bad guys than you can shake a stick at, Heli Intrusion will fulfill the fantasies of any helicopter fan. Watch you health meter, you can be taken out quickly if you take to many shots in rapid succession.