Interesting Question but is a must question for gamers, when I am unhappy I play Angry Birds. It is a real awesome game which destresses me . Have you tried ever?If not do give it a try and if you have tried already share which Game you played.
These days I play Unblock Me on Android when I am frustrated. Its really cool and totally takes your mind off the normal routine. The puzzles are of a variety of kinds for every intellect level.