Well guys, Halo Reach is finally backwards compatible to the Xbox One and it works great… almost. The game on Xbox One has some issues which does hurt the gameplay for most people on both the single player and multiplayer. The frame rate is not in constant 30 fps unlike the Xbox 360 version which it is, it’s below 30 fps but not below 20. Also, the game has some occasional small freezes that do pause the game for one second which can hurt the gameplay (especially on the multiplayer). I myself did not have too much of a problem while playing, but the downgrade is definitely noticeable and some friends of mine have told me that they can’t play like that.
Overall, the game is not as smooth as the 360 version, so I recommend someone to tell Microsoft to release an update that improves the frame rate and removes the freezes to ensure a better playtime with Reach on Xbox One.
There's the link to check out what I mean by Reach being downgraded on Xbox One versus the Xbox 360 version.