Blue Meanies 1.0Free
Blue Meanies is a near-perfect re-creation of a classic game (of the same name) on the Commodore VIC-20. It's been brought into the 21st century with new graphics, new types of Meanies, and increasingly difficult gameplay.
Shoot the Blue Meanies as they swarm your base, attempting to touch your reactor and destroying you and half the city! Note: Game requires keypad for play, so might not work so well on Powerbooks/iBooks.