#5 Lumines - [ PSP ]
There's no telling where the PSP would be without this quirky puzzler. Probably in a gutter somewhere, selling its internal circuits for cash. Say what you will about the PSP, but the system's performing amicably against Nintendo's portable juggernaut, and this funky and addictive puzzler was a driving force. Now that it's no longer exclusive to the system, is it time for Sony brass to worry?