Some assets for games with FOSS engines are cheap on GOG right now.
8mon 24d ago by slrpnk.net/u/poVoq in opensourcegames@lemmy.ml
cross-posted from: https://slrpnk.net/post/28010042
OpenGothic / Gothic 1 and Gothic 2
Also Quake 1,2,3 and probably some more.
I'm pretty sure there are some for the original tomb raider games too. I don't remember off the top of my head. But I know they exist, I think.