Play Rise of the Tomb Raider from 10/11 - 10/18 and get 100,000 free in-game credits used to purchase Expedition Card Packs. Valid for 360, X1, PS4, and PC.
http://www.gamespot.com/articles/play-rise-of-the-tomb-raider-next-week-and-get-100/1100-6444177/
http://www.gamespot.com/articles/play-rise-of-the-tomb-raider-next-week-and-get-100/1100-6444177/