Carmen Sandiego Math Detective

The plot of the game is that Carmen Sandiego has shrunk famous landmarks into crystals using the Quantum Crystallizer machine, which the player must restore to their full size. The player travels to different hideouts, and plays maths-related minigames, which when completed provide passwords. The game comes with "over 400 word problems, a strategy guide, glossary of math terms and progress reports". There are 3 levels of difficulty. (wikipedia.org)