Unlock New Levels:
To unlock 7 new levels, get a gold in every X Games competition. The 7 new levels will be the following:

-Deep Freeze Mountain: A really really long and steep 2 player mountain top race to the bottom.
-4 Slopestyle Events: They kick ass and now there are 4
-Grind or Die: a whole lot of rails and finally a wall to keep you from falling!
-Halfpipe Winter Style: A 2 player halfpipe that redefines snowboarding.

Thanks to Revolution reader marco!