I played The Omega Stone last year in Windows 7. I think I played from a disc purchased from All Video though I do have the game from Big Fish also (as well as the original disc). The All Video disc should work in Windows 10 and maybe 11 but I don't know about Big Fish. I don't see the game listed on the allvideo site so maybe it was a freebie he added. I've had it quite a few years. There are two recent reviews on Big Fish (one from 2022 and one from 2023) stating the game doesn't work. They don't say what operating system and it could just be their computers.
Huh, I just found where I posted about playing the game last year and I show I played the Big Fish version but something's not adding up to that on my end. I have a list I usually update but didn't and on my Win 7, it appears differently. Oh well, not important, just confusing myself.