Software developer and artist.
osu! is an amazing rhythm game. Try osu!lazer, it's the new client: https://osu.ppy.sh/home/download
I also like Pioneers and Endless Sky, both space sims.
This might not count, but both Lichess, a chess website, and OGS, a Go website are open source.
There is also Mindustry, but I haven't played it.
I have not, thanks for reminding me!
Sorry, I used the wrong wording. I meant to write that it feels a little like greenwashing to me, because I don't have a lot of faith in a "green transition" (not enough materials, exploitation of the global south etc...). But the good thing is that the solarpunk vision can work just as well in a low-tech environment.
I love the aesthetic and ideas, but personally I couldn't get into it that much. It seems feels too unrealistic and a little like greenwashing (renewable energy and other high-tech is core to the ideology).
A book featuring the style which I really liked was A Psalm for the Wild-Built.
The whole list:
Some highlights:
I'd still consider the game open source, even if the art is copyrighted.
Is there an open source version? It's a great game (also try the steam edition if you check it out), but I thought it was closed-source.