The Wonder Boy series, also known as the Monster World series, is a franchise of video games published by Sega and developed by Westone Bit Entertainment. Beginning with the original Wonder Boy arcade game released in April 21, 1986, the game has spawned several sequels released for arcade, Master System, and Sega Genesis, as well as three compilation titles and three remakes by other developers. Several titles have been ported to other consoles by different publishers under different names, most notably Hudson Soft's Adventure Island adaptation of the original game.