Modern games have a somewhat natural life-cycle where they initially emerge, sink back down, float back up for a sale, and repeat thanks to digital marketplaces. The boxed copies of a title will usually shuffle about in retail for a good year or so after initial release, but it's the digital side of things that tends to keep a title going. As of today, the digital life for Teenage Mutant Ninja Turtles: Mutants in Manhattan is at an end.