An anonymous reader writes "It's been a long-talked-about but never fully realized aim of developers, publishers and format holders to create a game that runs on multiple platforms, but connects and exchanges assets between them — e.g. you play a game as an FPS on a console/PC but control it as an RTS on mobile devices. Now, Rockstar Games seems to have cracked it, on a small scale, with news that a new Flash game will allow PC gamers to generate in-game cash — true to form for GTA-creator Rockstar, it's through 'money laundering' — that is then transferred to its new Nintendo DS title, Chinatown Wars. GameSpy's online technology seems to be responsible for this latest gimmick, but most interesting is the idea that this could allow an interface between platforms like the iPhone and consoles as well. How long until an indie developer creates an MMO that has different interfaces for PC and mobile?"