Ski Doo Snowmobile Challenge - Xbox 360 Tear through 25 tracks at over 100 mph with HD cinematic speed effects Go head-to-head in 12 player online matches using Xbox LIVE Compete in Snow Cross, Cross Country, Aerial Freestyle, and Hill Cross events Earn Adrenaline with tricks and treachery, then go into Overdrive Perform 16 dangerous stunts in mid-air, for big points... if you can land. Ride 20 authentic Ski-Doo snowmobiles. Purchase upgrades for every sled, customize their colors and decals. Personalize your rider with official Ski-Doo gear