Heavyweight Champ is an online MASTER game that you can play at Emulator Online. This free Sega Master System game is the United States of America region version for the USA. Heavyweight Champ is a single title from the many arcade games, sports games and fighting games offered for this console. If you enjoyed playing this, then you can find similar games in the master games category. Heavyweight Champ game is from the various retro games on the site, and there are more games like this, including Greatest Heavyweights of the Ring, Street Fighter II Champ. Edition and Muhammad Ali Heavyweight Boxing.