pre-order DARK SOULS™ III comes with DARK SOULS 1 on BC.

Aug 12, 2008
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tyneside
#1
Game Description:For a limited time, purchase a digital pre-order of Dark Souls 3 on the Xbox One Store and get the original Dark Souls playable on Xbox One. The code for Dark Souls will be delivered to your Xbox message center in 7-10 days. You can redeem the code on your Xbox One console or at xbox.com/redeemcode.
https://store.xbox.com
 
Aug 12, 2008
2,828
32
48
tyneside
#3
[QUOTE="keefy, post: 6503062]Can you pop in your old Xbox discs and they will work, or does it have to be ones they prepared for emulation?[/QUOTE]
i'd imagine that once it's available, you will be able to put the disk in (as you can with other 360 disc BC titles) your xbox one and the game will download to your xbox one. but you will need to keep the disk in the drive to play.