Muhammad Ali Heavyweight Boxing, as the name implies, is a boxing game featuring the three-time World Heavyweight Champion. The game display 2D sprite-drawn boxers in a 3D ring (the so-called "FreeCam" 3D system), with the boxers moving around the ring in 360°.
One or two players can choose the number of rounds (up to 15), the round length (up to 5 minutes), the number of times a fighter must be taken down to be T.K.O. and the number of referee counts (up to 10). There are two game modes: exhibition (which can be played against the computer or one-on-one by two players) and the tournament mode (single player). Players can choose among nine fictional fighters plus Muhammad Ali himself.
The game features digitized speech, including samples of Ali's voice.