Mario Is Missing! is an educational game. The computer version is a point-and-click adventure, while the NES and SNES have platform game elements.[1] In the game, Bowser, king of the Koopas, has relocated from the Mushroom Kingdom to the real world, where he has set up his headquarters in an Antarctic castle.[2][1] Bowser plans to steal the Earth's treasures with the use of the Passcode-Operated Remote Transportation and Larceny System (PORTALS), which allows his Koopas to teleport anywhere in the world.[2] Bowser plans to sell the treasures to pay for enough hairdryers so he can melt the ice of Antarctica.[3][4] Bowser captures Mario to prevent him from foiling the plan, and it is up to Mario's brother Luigi to save him.[2]