Atari 2600

Warplock

The graphics are minimal, and the constant beeping is annoying as hell. The control is good however, and Warplock does provides a decent challenge. Unlike most games, you only have one life. You score one point per each hit, and it's actually tough to score above 25. For some reason, shooting one invader in a group automatically kills the rest. It's a weak effort, but Warplock manages to be fun in spite of itself.