The yearly Steam Autumn sale has just started about 15 minutes ago and runs until Monday, November 26. There are two sections of deals, daily deals and flash deals. Three of the flash deals have a 16 hour timer and the other half have a 10 hour timer. The daily deals have a 48 hour timer, but that seems to be a mistake as they are usually available for 24 hours. Recently released games Darksiders II and XCOM: Enemy Unknown highlight the daily deals, and a number of other recently released titles, such as Borderlands 2, have also received a discount. Unfortunately, there doesn't appear to be an achievement based game associated with the sale this time around.