SquareEnix is running a special promo for Xbox One owners. Check it out here: http://www.squareenixbonusgames.com/
How it works – buy a new copy of Final Fantasy XV, Just Cause 3, Life is Strange, or Deus Ex Mankind Divided and get a digital copy of Dungeon Siege III, Just Cause 2, Kane & Lynch 2 Dog Days, Supreme Commander 2, or Deus Ex Human Revolution.
Users have to register using the website above. A registration code is required. No word on how long this promo will last but it can be assumed it will be for a limited time.