I'm looking at getting my hands on some Xbox games that possibly slipped under my radar when released but are still good. Any suggestions?

As a starter, I nominate Lost Odyssey. I'm in the final quarter of this now and I haven't enjoyed a JRPG half as much since FFVII. The fight mechanics and levelling system are nicely simple but with lots of little nuances that you can tweak to get the most from the characters. In short, it's really good.

Your go.