Update: You can check out the full list of titles included in the sale in our comprehensive guide.
Some of the most significant early offers in the Countdown sale include Call of Duty: Infinite Warfare for $38.99 ($44.99 for non-XBL Gold members) – as well as the game’s Legacy Edition for $59.99 ($67.99 for non-Gold members).
Gears of War 4, meanwhile, is $38.99 for all users, while Mafia III is the same price for Gold subscribers ($44.99 for non-members). Team 17’s Variety Pack is also on offer at 50 percent off, priced at $24.74.
Destiny: The Taken King has been discounted to $11.99, while Dead or Alive: Last Round Story Mode is $10.49.
A number of new deals are expected to be added to the store over the course of the next 48 hours.