[nerdjon]

Which Forza and which LTSC version?

I have not had issues with Horizon 5 or the new Forza on my steam deck under Windows 10 LTSC 2021. I believe I played both at or near launch.

That is the first I have heard of a game not working on LTSC.

Edit:

My timeline is off, I did not try Horizon 5 on my steam deck until about a year after it came out since Horizon 5 predated the steam deck.

However worth pointing out that it is one example of a game not working on LTSC vs many examples on proton so I would argue it still Wins out on compatibility.

[Berazu]

Horizon 5 did not work for me and many others on Windows 10 LTSC Version 1809 when it was the de-facto latest LTSC available. I'm not sure what feature was missing but it was working just fine with the latest Windows 10 Pro version available at that time. Of course things might differ now but I still wouldn't say that compatibility is big on LTSC when there's a high chance that a new game might be missing essential features which only get added in the next LTSC version.

See also: https://www.reddit.com/r/Windows10LTSC/wiki/incompatibility