I deleted my only copy of Windows and reinstalled OpenBSD on my big PC. It's way better in almost every respect but I miss video games lol. I'll probably install Linux somewhere and boot that to play video games eventually but games on your native operating system are pretty convenient
Edit: thanks for all your recs, I am crashing from caffeine rn and have to log off lol, will check them all later
openTTD and uhhhh openRCT2 which is technically not fully open source. It requires original game files to play
Ohhh right I forgot about those games! Thanks for the recs