Castle Crashers is pretty damn good.

[SNKNostalgia]

Castle Crashers is a fun ass game. The makers of Alien Hominid, Behemoth made this awesome RPG/Beat-em up. There is a lot of Zelda and Guardian Heroes influence in the game. I like this game more than Alien Hominid which is also fun to me. The music in the game really impressed me with the old style gaming feel to it. I highly suggest downloading this. I got it for X-box Live Arcade.

[Mobius]

See, I WANT to get this game, but I've heard it has horrible, game-breaking bugs.  I.e., I won't be able to finish because my save will get erased, and online is just flat out broken.  I've been planning to get it when the patch comes out, but with how long that's taking, I'm afraid everyone will have moved on to something else.