Let's list a few online games of mine:
Battlefield 1942 (With any expansion, I have them all).
Medieval 2: Total war
Diablo II
Warcraft 3
Forgotten realms series (Including Icewind dale, Baldur's gate and Neverwinter Nights)
Starcraft (I suck at it)
Age of Empires 1 & 2
Battlefield 2.
And I have some free ones. I'm too lazy to post more than that.