CDKeys offers downloads of Halo 5: Guardians Digital Deluxe Edition for Xbox One for $16.09. That's $3 under last week's mention and the lowest price we've seen. (It's the best deal now by $54.) It includes the full base game, Warzone REQ bundle, and Halo: The Fall of Reach animated series.

Note: New customers can provide an email address on the CDKeys Facebook page to get a unique coupon code that cuts an extra 5% off.

Update: The price has increased to $18.19.