Wonder Boy In Monster World ROM Download for SEGA Genesis (Genesis) on Emulator Games. Play Wonder Boy In Monster World game that is available in the United States of America (USA) version only on this website. Wonder Boy In Monster World is a SEGA Genesis emulator game that you can download to your computer or play online within your browser. You can also download free ROMs such as Wonder Boy V - Monster World III, Paperboy (JUE) and Teenage Mutant Ninja Turtles - The Hyperstone Heist as shown below. Wonder Boy In Monster World works on all your devices in high quality.