Gaming in sepia or black & white possible?

[em2nought]

Is there a hardware or software solution that would let me game in sepia or black & white? I noticed that Task Force Admiral is displaying a sepia filter on their work in progress. This is something I've thought about before as I'd like to be able to do this to flight sims, and also as a way to shrink files for better performance particularly if you assigned a palette. I guess Nvidia has done this, https://www.pcgamesn.com/nvidia-freestyle-filters, but I've never seen anything more than this blurb about it.

[Blackhawk]

I've used Nvidia Freestyle, and it works fine. You could probably also use ENBSeries.

[hitbyambulance]

then of course, there are the titles already available (and only available) in that palette



and you can even pick which old computer platform you want it to look like:

https://za.ign.com/the-return-of-the-ob ... a-dinn?p=1

[em2nought]

Thanks for the replies. I guess that "Freestyle" even has an "old film" filter with artifacts and all https://www.youtube.com/watch?v=agXH1_VlaiM

[Blackhawk]

I've thought about trying Mafia or LA Noire using it a few times.

[Chraolic]

I had a look around and didn't find anything too helpful, but I did find this article where someone modded a sepia filter in SimCity and it suddenly looks like a town from the 1930s. The article is about colour blindness so I guess it wasn't exactly what they intended, but it's still pretty neat. I don't think I'd want to play like that, though.
https://www.vg247.com/simcity-has-3-col ... ns-filters