Step into the shoes of Mark Tyler, a legendary boxer who's defended his Heavyweight title nine times by the year 2006. But now, you're about to take on a challenge that's literally out of this world! The Intergalactic Boxing Federation has called upon you to compete in a tournament against 12 of the universe's most formidable fighters. From cyborgs to mutants, these opponents are unlike anything you've ever faced. Get ready to train hard on the IGBF Training Ship, because one of these metallic challengers is rumored to have a left hook strong enough to topple a building! Use all your skills and experience in the ring to prove you're not just the best on Earth, but the Heavyweight Champion of the Universe!