Edited December 26, 2017
at 02:36 PM
CDkeys.com currently has Tom Clancy's Rainbow Six Siege for the Xbox One for $12.59
Use Promo Code: CDK36454 for 3% off the purchase.
Bringing the total to $12.21
Or make an Account and sign into Facebook, then like their page on their website for 5% off.
A great deal for a wonderful game, the community for this game is thriving.
I've purchased from CdKeys.com multiple times have never had a problem.