Mega Man III ROM Download for Gameboy (GB) on Emulator Games. Play Mega Man III game that is available in the United States of America (USA) version only on this website. Mega Man III is a Gameboy emulator game that you can download to your computer or play online within your browser. You can also download free ROMs such as Mega Man - Dr. Wily's Revenge, Donkey Kong Land III and Mega Man V as shown below. Mega Man III works on all your devices in high quality.