Wacko was wacky in a variety of ways, most noticeably with its oddball cabinet design, which tilted at an extreme angle (yes, this is what the cabinet looked like). The game itself puts you in control of alien Kapt. Krooz'r, previously the star of 1982's Kozmik Krooz'r, and tasks you with eliminating monsters in a sort of matching game variation of Robotron: 2084. You must shoot the monsters in pairs, and as the levels progress, shooting non-matching creatures creates even weirder mutants. The control scheme uses a trackball for movement and a joystick for firing, but it plays acceptably with two 8-way joysticks.