I guess I would start by breaking down why Tin Star was so popular. Personally, that was - and is - the only IF (that takes place in a historical and non-fantasy setting) that I greatly enjoyed and will replay it over and over again.
I liked the cast, the world, and how the Marshall fit into all of it, to put it very plainly; the epilogue for each character was a very nice sendoff that made it all the more memorable; all in all, it was an enjoyable experience from start to finish.
On the one hand, I think the only other historically set IF I’ve read is Pendragon Rising and it was… I don’t know… lackluster? It was okay, but I never ended it feeling satisfied, so I’ve never really replayed it to the extent I’ve replayed Tin Star over and over and over again.
On the other hand, historical fiction isn’t exactly my cup of tea. It’s just not an attention grabber to me, especially in the fictional setting. To be completely honest, I’m more enthralled by my history books than an actual piece of historical fiction for some strange reason.
Not exactly the route Tin Star took since the Marshall wasn’t supposed to be, as far as I’m aware, someone famous from the Wild West. This option, or something similar to what Tin Star did, would probably be the PoV I would prefer to play as since it would, theoretically, provide more agency to the MC versus playing as someone who’s actions are set in stone so to speak.
Personally, while historical fiction isn’t my preferred choice, I’d still be wiling to play the demo of a historically set IF if I was offered it. Upon some reflection, maybe I’m just not interested in the time periods and time settings that have been offered so far?
If someone offered me an IF where I could play as a member of a Kazakh tribe and the MC learned how to hunt with a golden eagle? Yes, I would absolutely play that!