Desert island videogames

Gaming Nexus has a nifty feature up that highlights their staff writers' favorite games.
Which ones could you just not live without? It's a good read, though it's kind of a wimp-out to let them choose five.
It's much tougher to figure out which your top three would be. But it's fun to see how seven different people would make the fateful decision. One of them chooses mostly simulation games, like Microsoft's Flight Simulator 2004 (see exciting screenshot to the right). This man is not welcome in my home. Other choices, like Grand Theft Auto Double Pack and Unreal Tournament 2004 make much more sense.