Xonotic
I still haven’t tried it, but I’ve heard how great Veloren apparently is. It’s an MMO voxel game that takes inspiration from Zelda: Breath of the Wild and is written in Rust.
Early game is a bit confusing and direction less last I played but once you get your bearings its a load of fun
it’s not really a game, but openmw
Morrowind was Bethesda’s peak moment, so obviously foss engine keeping it alive to this day is awesome!
Space Station 13.
Too many amazing moments and memories to even count, always more to learn. I love how the open source nature of the game means there’s many different servers branching off from each other, running their own custom versions of the game. Smaller servers “downstream” pick and choose which features they want to keep when the upstream servers implement something new.
You might not be aware but there’s also a fairly content-rich successor project called SpaceStation 14! Its obviously nowhere near as featureful as 13 is, due to lack of development time but has a very active development community around it.
One of the major (imo) improvements is a move to per pixel “real time” movement instead of the tile movement of ss13, it helps make them game feel much more alive and interactive.
Definitely worth a look for fans of ss13, and its also open source and Linux compatible.
SS14 even has their own Lemmy instance.
Simutrans and Cataclysm: Dark Days Ahead
Simutrans
Can I finally create a city with proper public transportation, full of trams???😳
Wait, there’s opentdd, another similar game👀
Probably not unless you get public funding (eg, run a massive deficit, take control of the public AI to build stuff, debug features, etc) or you first create a resource chain or two to pay for transit.