Steam's holiday sale has a "Gift pile" and you have a chance to get free games for completing achievements!
Go here to see the daily achievements: http://store.steampowered.com/holidaysale/
Leaked achievements list: http://steamtreasurehunt.wikia.com/wiki/Winter_Objectives#Upcoming_Objectives
Also, steam's servers are taking a hit right now, so a lot of features don't really work at the moment.
Go here to see the daily achievements: http://store.steampowered.com/holidaysale/
Leaked achievements list: http://steamtreasurehunt.wikia.com/wiki/Winter_Objectives#Upcoming_Objectives
Also, steam's servers are taking a hit right now, so a lot of features don't really work at the moment.