IGN: Hydro Thunder Hurricane
1600 points on XBL Arcade, and pretty damn fun! If you liked Trials HD or Pure, it's the same basic kind of physics/graphics. That review doesn't like it, but I think it's worth it.
The tracks are all pretty awesome. There's a viking themed one where there are axes and sea monsters falling all over the place, big monsters that make the tide swell, and norse style boats that crash into you and shit.
Used to play this in the real arcades back in the day (remember when those existed and were good?)