Exceptional multiplayer Tetris.
I haven’t played it in a long time, but I always enjoyed Super Tux Kart. It reminded me more of the Moorhuhn / Crazy Chicken Kart games than Mario Kart. In general, before Steam Proton made Gaming on Linux almost free of any hassle, I spent more time with free and open source games like Nethack or Battle for Wesnoth that are available in many Linux package managers.
Minecraft
I wouldn’t call it one of the “best games” anymore… maybe not ever, but “Escape from Tarkov”.
While I’m digging my own grave here let me also mention “Star Citizen”.
I sure hope my grandkids will get to play star citizen
Old school RuneScape
True, but you have to play via standard client as far as I know, which sucks in my opinion. RuneLite is much, much better.
The only one with current popularity I know of is Escape from Tarkov. And most others from the past are now on Steam or other big stores (Toribash, Minecraft, Dwarf Fortress).
Unless VNs are your thing. There’s loads of awesome VNs on Itch.io. Though, I wouldn’t say that itch.io is not a big name. It appears more in conversation about games than GOG does.
Unciv is a civilization clone for mobile platforms and its great if those games are your thing
Just recently figured out Aux1 key is sprint, so VoxeLibre on Luanti has been much more playable for me to the point I can recommend it. Though Luanti in general is something I would suggest because they have some great games. I personally finished a short little puzzle like game called Eyeballs and it was pretty good.
Also, because I am very biased towards this game, Pokemon Uranium. Have to include it in my list of the best of the best. Same with Sonic Robo Blast 2 w/ the reveries mod.
Though if all of those don’t catch your fancy, there’s the still very WIP game open source SuperTux Advance is a lot of fun and in my opinion so much better than standard SuperTux. I absolutely approve it and list it as one of the best currently in its current incomplete state.
Beyond All Reason. Outstanding RTS thats independant and free. Not F2P but actually free.
That reminds me a lot of Supreme Commander and Planetary Annihilation
Shattered Pixel Dungeon - roguelike
Luanti (previously known as Minetest) - voxel builder
lichess - chess
Wargus
DevilutionX
Doom2
ScummVM
OpenMW
Daggerfall Unity
UnCiv
isn’t Dark and Darker delisted from steam per some bullshit settlement?
It was but it’s back
Escape from Tarkov
And I don’t know why they are not on steam
Last information is that they are moving to Steam for their 1.0 launch.
Guild Wars 2
It normally is not a steam game. You can buy it through steam if you want, but you can buy it straight through the maker of the game. just search for Guild wars two on Google. That will show you the actual homepage for the game.
