Wonder Boy is a 1986 platformer video game published by Sega and developed by Escape (now known as Westone Bit Entertainment). It was the first in the long-running Wonder Boy series of games and was followed up by five sequels, Wonder Boy in Monster Land, Wonder Boy III: Monster Lair, Wonder Boy III: The Dragon's Trap, Wonder Boy in Monster World and Monster World IV. It was also the basis for the Adventure Island series.

Published by Sega Enterprises, Ltd.

Released March 03, 1986