I'd be curious to know what everyone's favorite computer game is and why. I'll start:

Mine is Half Life 2. Why? Half Life 2 has a fantastic story. It has suspense, action, puzzles to solve, and a fun group of bad guys. I don't know how many times I've played it over the years but I never tire of it. Don't get me wrong, I don't play it constantly. Maybe once a year or so I'll run through it along with the sequels. Even though I always know what's coming, the suspense gets me. I definitely got my money's worth.

What is yours?