Well these are the games that I own and could play online(besides ffr):

PC Games:
1.)Command and Conquer Generals
2.)Command and Conquer Generals: Zero Hour
3.)Command and Conquer 3:Tiberium Wars
4.)Counter-Strike Source
5.)Supreme Commander
6.)Team Fortress 2
7.)Half-Life
8.)Flashflashrevolution.com
9.)Crysis
10.)Starcraft Brood War
11.)Unreal Tournament 3
12.)Warcraft 3 Reign of Chaos(sorry don't have expansion)

Wii Games:
1.)Mario Strikers Charged
2.)Super Smash Bros. Brawl
3.)Mario Kart Wii

P.S.
I bet you that I can own your ass in any of these games :P