Steam has launched its annual holiday sale from now until Jan. 1, offering huge savings on games and a couple of fun promotions: The Great Gift Pile challenges gamers to complete up to six objectives each day to win free games and coupons. Participants who don’t win earn lumps of Coal that they can use to enter the Epic Holiday Giveaway, where the top prize is to win every game on Steam! The more coal you have, the better your chances to win. Visit Steam to check out the complete list of holiday deals.