Atlantis no Nazo (Japanese: アトランチスの謎, Hepburn: Atoranchisu no Nazo, "The Mystery of Atlantis") is a side-scrolling platform video game developed and published by Sunsoft and released for the Family Computer in 1986.

The game is set in the mythical land of Atlantis. The player controls an amateur adventurer named Wynn (ウィン), whose objective is to save his master being held captive in the final level.