Knights in the Nightmare for DS.
It is so fucking good I just want to talk about it. I tilt my head down to play it and when I look back up two hours have passed. It's one of the most original games I've ever played, right up there with Katamari Damacy, Portal and Guitar Hero in terms of creativity. I haven't had this much fun with an RPG since WoW and Final Fantasy Tactics. It's one of those games that you can spend 99+ hours just grinding for no reason other than the gameplay is just so fucking fun.
Who else is playing it? If not, why aren't you?
Sleeper hit of the year.