I’ve been getting really into Vampire: The Masquerade - Bloodlines and Redemption, old school Runescape, Ragnarok Online, Arcanum, Diablo II, and others lately, and I’m looking for more 90s/early 00s PC games that will run on my new Thinkpad E15 G4 running Arch Linux.
I highly recommend looking into Spiderweb Software games. They’ve been pumping out top down turn based tactics rpgs for years now. I am not sure of the viability on Linux, but I’m sure there is a workaround if anything.
The Avernum series in particular is great if you’re into detailed character building, exploring, and high difficulty optional quests/bosses!