Ok BG2 it is. On to 2001 then.
It looks like a lean year but there's a couple big ones for me, Stronghold and Civ3. I see some notable names on wikipedia that I haven't played, Runescape, Phantasy Star Online, Black & White, Paper Mario, Dark Age of Camelot, Halo. Xbox and gamecube both released that year, that's pretty notable though outside game of the year talk.
Halo is probably the biggest game since it started a whole franchise, and civ3 is probably my least favorite civ game (4 is far and away my favorite, 2 and 5 are distant second, 3 and 1 are a notch below that), but I'm still voting civ3 since I'm familiar with it and don't feel right voting for a game I never played.