Best Buy is currently selling Halo 5 Guardians Limited Edition for Xbox One for only $19.99 which is $10 cheaper than even the regular version of the game during their Boxing Day sale.
The Limited Edition game contains additional digital content for more enhanced Spartan combat as well as exclusive offers plus the Warzone REQ bundle includes 14 Premium Requisition packs to step up your Spartan combat.
It comes in a steel book look case exclusive to the limited edition and there is a small Guardian model included in your bundle. If you do not have a current Xbox Gold membership, it also has a 14 day free trial so you can try out the features of the Warzone REQ bundle which required Gold.
Click here to buy this deal on Halo 5 before the price goes back up.