I am looking for a drama or a movie that is similar to LIAR GAME or a good Who dunnit movie. Any recommendations are more than welcome\!!!
Ousama Game
Mirai Nikki
Bloody Monday
As The Gods Will
Akagi
Maybe Dr.Frost? it's also a psychological 
I second White Christmas. Simply the best.
Yokoso Wagaya E. It's family-mistery,so gripping to find the culprit.
I agree with White Christmas!!!  Also a J-drama called Limit...has a similar vibe to White Christmas
Dr Frost. Missing Noir M, A Beautiful Mind, Signal, Death Note