What's a good online multi-player game that's free?
Maybe a shooter, or strategy?
The Mafia Boss, Chosen Space and GangstaBigHouse are some of the best free online multiplayer games. You can also play WebLords, Trophy Manager and Interstellar War. Pro Evolution Soccer 2 and Visual Utopia are also worth checking out.
Team Fortress 2! It's free on Steam. :D
Arma 2 free, if your computer can run it