Tetris, to tell the truth, and now it would seem the game has real health benefits. According to a study done in the UK, the game can help those with post-traumatic stress disorder. The study exposed volunteers to disturbing imagery and, for some, allowed them to play the game after. For those that played the game, stress levels reduced and they suffered from fewer flashbacks of the disturbing imagery.
So, make more time in your busy life to play some games. It's good for you!