Heli Attack 2
Dodge bullets from enemy helicopters, and shoot them down yourself. Get powerups with flamethrowers, rail guns, fire mines, jetpacks, rocket launchers, seeker launchers and other things. You also have the ability to slow down time and hyper jump on top of the helicopters. This is a game that actually is easier on a slower computer. On my computer (a Dell Dimension 2400) it is very fast, but at my friends house, the game is about twice as slow, and easier to dodge. For example, on my computer my top score is 21, on his computer it is 63...
This is a very fun game when you get used to the controls.