SteamPowered.com - Team Fortress 2 Free This Weekend
*Must have Steam installed.
About the Game:
"This year's most anticipated online action game, TF2 delivers new gametypes, a signature art style powered by Valve's next generation animation technology, persistent player statistics, and more.
Unlike other "class-based" games that offer a variety of combat classes only, Team Fortress 2 packs a wild variety of classes which provide a broad range of tactical abilities and personalities, and lend themselves to a variety of player skills."