Left 4 Dead 2 Is Free This Weekend
Left 4 Dead 2 is free on Steam until Monday.
To celebrate Halloween Valve has decided to make Left 4 Dead 2 free on Steam this weekend. The game will be free until Monday so start pre-loading now if you don't already own the game, just click this link to download the game.
Valve also created a new achievement for current players called "Good Guy Nick"-“Plays games with free weekend players and helps them survive a campaign.”