My top five:
5. Starcraft. Just such a great, classic game. Really love it.
4. Icewind Dale (and the sequel, though the expansions for the original can go fall in a hole and die in a fire). I'm a sucker for the Infinity Engine games.
3. Star Trek Armada 2. I know, it's a pretty bad game, but I really love it. Always have, always will.
2. Warcraft 2 and 3 (with expansions). See the Starcraft entry, but add "Zug zug!"
1. Baldur's Gate 2: Shadows of Amn (and Throne of Bhaal). Perhaps the greatest game I have ever played. With over 200 hours of playtime, and more mods than I know what to do with, BG2 reigns in my heart as my favorite game of all time, and the only one I will NEVER give up, no matter what. GO FOR THE EYES BOO, GO FOR THE EYES!!!!!
NINJAEDIT: Oh, and yeah, I almost forgot #0.5
0.5: Lemmings, the original. If loving little green haired blue suicidal freaks makes me a bad person, then chalk me up as the worst person to ever live.
