So I played a couple hours of Red Dead Redemption in backwards compatibility on my Xbox One last night. This is one of the biggest holes in my backlog so I'm glad to be able to finally play it. I can confirm that it runs much better in backwards compatibility than the Gears of War games me and
yourbeliefs played together. It also holds up very well so far both in graphics and gameplay for a game from 2010. I will definitely post my in depth opinions about it when I finish the game. Right now I'm juggling it with Overwatch, Doom, and Stardew Valley so it could take a while.
Anyways, the real reason for my post is that I seem to have access to a lot of DLC that I shouldn't. I have confirmed by looking at my receipt in my email that I bought the standard version of the game back in March when it was on sale for $7.49. I did not buy any of the DLC except for the stuff that was offered for free about a week ago.
In addition to the DLC that was offered for free I also have the War Horse, Golden Gun Pack, and Deadly Assassin costume. I first noticed I had this stuff when I saw that my guns were gold by default. I checked the menus and the Horse and costume DLC where there too though. Most importantly I have the option to select Undead Nightmare from the main menu instead of the base game. This is a beefy expansion that is supposed to cost $9.99 and I am positive I didn't buy it. Next time I play RDR I will try selecting Undead Nightmare and confirm that it works.
The only thing I can think of that could have caused this is that I originally bought the GOTY edition for 360 on disc back in 2011. I only played a couple hours of it before I started having constant disc read errors because of my failing 360 and I never went back to it. I just confirmed that Undead Nightmare and all the other DLC was on the disc in the GOTY edition and not a digital code though. I'm not sure how all of the GOTY edition content could be showing up on my account now if it was on a disc I haven't had for years instead of downloadable codes.