If you love suspense, you must see the movie The Game.

Here's a description:

San Francisco banker Nicholas Van Orton (Michael Douglas) is a financial genius and a coldhearted loner. On his birthday, he receives an unusual present from his brother (Sean Penn) -- a gift certificate to play a unique kind of game. In about a nanosecond, Douglas finds himself consumed by the game and unable to distinguish where the charade ends and reality begins.

It's rated R and not exactly a "happy movie". But it's a great movie, there are so many twists and turns.