Bad news, detective! There's trouble in Moscow, Russia. St Basil's Cathedral has disintegrated! All that's left is a giant pile of sand. The Chief wants ACME's best agent on this case, and that means you, detective. Get to Moscow fast and find out what's going on before any more monuments turn into giant sand castles. Carmen Sandiego is back and only you can foil her V.I.L.E plans. Travel the globe, solve brain-twisting math puzzles, and catch the villain behind the Crumbling Cathedral. Crack the case of the Crumbling Cathedral in single-player Story Mode. Perfect your math skills in single-player Practice Mode. Challenge your friends and family to solve math puzzles against the clock in Multiplayer Mode. In Carmen Sandiego Adventures in Math, you practice your math skills and use them to fight crime. Ideal for grades 4-5, math topics include arithmetic, logic puzzles, fractions and much more!