Adventure Island II is a side-scrolling platform game developed by Now Production and published by Hudson Soft that was released for the Nintendo Entertainment System in 1991. It is the sequel to Adventure Island and the second game in the series for the NES. While the first game was an adaptation of Sega's Wonder Boy arcade game, Adventure Island II is an original work, as were all the subsequent Adventure Island games. A portable version was also released for the Game Boy in 1992 titled Takahashi Meijin no Bouken Jima II or Adventure Island outside of Japan.