Pre-ordering Doom on Xbox One gets you two classics via backwards compatibility.
According to a listing for the game on the Australian Xbox Store, customers get the original Doom and Doom 2 for free when pre-ordering. The games will of course be playable on Xbox One through backwards compatibility.
As is typically the case, the codes are delivered seven to ten days via a private message, through which you can redeem the games for your account.
Bethesda recently revealed Warpath, the game's take on King of the Hill.
Doom is out May 13 on PC, PlayStation 4, and Xbox One.