Mario is Missing is a geography-based educational game where Bowser has set up his headquarters in Antarctica and created portals to 25 famous cities around the world. His goal is to wreak havoc on our own world by kidnapping Mario, and it's up to you to play as Luigi and stop him.
As you explore each city through the portals, you'll need to track down Koopas who have stolen famous artifacts, gather clues about your location, and find a way to call for Yoshi's help. Once you've tracked down Yoshi, he'll guide you to the Pokey guarding the return portal, which only Luigi can close forever.
The game aims to teach children about geography by familiarizing them with landmarks and artifacts in each city. By returning stolen artifacts to their proper places, players can even take photographs of what they've collected. An add-on disk is available that adds ten more cities to the game.