0 A.D.. It is even open source.
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.
The Operative: No One Lives Forever
StarSector (whoops, not two words) https://fractalsoftworks.com/
Awesome game
That looks similar like Endless Sky
Similar but much deeper and lots of mods.
With a vibrant modding ecosystem!
Fantastic game! After playing for a lot of hours I realized there were some mods which made me play even more lol.
Btw, Sseth had a video on it https://youtu.be/acqpulP1hLo
Vintage Story, a Minecraft alternative that’s much more focused on survival and primitive technology. It’s sold only on its website.
Got this recently for my wife and I to play together and we are loving it so far. Just about reached bronze but don’t have a reliable supply of tin and winter is setting in so we are looking forward to getting our base set up and exploring some caves and ruins. We’ve got plenty of food, just hoping to squeeze another set of flax out of the farm before it’s too cold.
We watched Rubix Raptors YouTube series on it and loved the mix of chill crafting with more hardcore survival mechanics and a little dusting of cosmic horror.
It’s also pretty cheap for what you’re getting at about £20 it’s still in early access but is totally functional. We’ve played over 20 hours and haven’t hit a single bug which broke anything (just had our player models not display properly a couple of times). It’s also got really excellent built in modding support and what looks like a shed load of excellent mods.
VS is great. It’s what Terrafirmacraft would have been as a game instead of a mod, and it has a fairly vibrant modding community of its own. I’d still like to see some more development on it but it’s great so far.
Minecraft
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.
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
Minecraft java edition, but that feels like cheating
There are a lot of cool free games playable on your browser made for game jams on itch.io
Wargus
DevilutionX
Doom2
ScummVM
OpenMW
Daggerfall Unity
UnCiv