Your cowardly general has run away and left you all by yourself to defend your base against a relentless horde of enemy troops, armored helicopters, and more. Fortunately, you've got an unlimited supply of bullets. However, it takes about 4 shots to kill an enemy soldier and at least a couple of hits with an anti-aircraft weapon to drop a helicopter. You'll occasionally get health bonuses and additional anti-aircraft ammo along the way, but be careful not to waste them.
Controls: Mouse to aim and fire; 1-2-3 to select weapons.