
Update #2 []:
Following Rockstar's update, we're finally seeing the free upgrade starting to roll out for owners of the Xbox 360 version. It's appearing with a "Just For You" banner and a notification that the offer "expires in 13 days", but we assume the discount will be made permanent - it might be worth grabbing it ASAP just in case!
Here's a look at it:


Update #1 []:
Rockstar Games has now announced via social media that there is an "issue" with upgrading from the digital Xbox 360 version of Red Dead Redemption to the new Xbox Series X|S version, and they're working with Microsoft to fix it.
"We are aware of an issue where Xbox players are unable to upgrade their digital Xbox 360 version of Red Dead Redemption to the Xbox Series X|S version and are working with Microsoft to resolve it. Thank you for your patience."
Original Story: The new upgrade for Red Dead Redemption is out today on all platforms, and while the game is now live and playable on Xbox Series X|S, the upgrade path from the old Xbox 360 version isn't working for lots of players - and there's some confusion as to why at the moment.
When the team at Rockstar announced this new version of RDR last month, they said that "current owners on PS4, Nintendo Switch, or the digital backward compatible version on Xbox One will be able to upgrade digitally for free". However, right now, lots existing owners of Red Dead on 360/Xbox One are being asked to pay the team's introductory 50% off discount for the new version.