What movie is this?!

I saw it on MTV a few years ago. It was about 4 college freshmen friends going home from snowboarding, but their car gets trapped under several feet of snow. To pass the time and try not to worry about running out of air, they play a game where they tell really personal secrets about themselves. The movie gets really intense, the one kid tries to rape the girl, and they all end up dying in the end. I cannot for the life of me remember what it is called. Help!