What is your only one game that you think there never will be a game that you can enjoy more?

For me, it has to be:

Operation FlashPoint: Cold War Crises

Just awesome. The only game I like in it's field, too. Really just awesome. You die easily (So you can't jurk around like superman), you must corporate with fellow 'soldiers', dynamic campaign (That plane won't just come from their, sometimes it won't come, sometimes you will win, sometimes you will lose, sometimes you will lose your plane, sometimes you will.. etc..). To cut it short: A must have game.