Right now you can pick up DOOM for the Xbox One for just $40 at Amazon, a savings of $20. This sale is on the physical disc copy of the game, and not the digital download, so you will need to wait to receive it to begin playing. DOOM has received some rave reviews, including from our very own Jez Corden, so be sure to check that out before picking it up.
If you are interested in DOOM and have yet to pick up a copy, this may be your best bet. Be sure to act quickly on the deal though, as we don't know how long it will be live for.