151
A curated list of awesome FOSS games
(github.com)
If it's free and open source and it's also software, it can be discussed here. Subcommunity of Technology.
This community's icon was made by Aaron Schneider, under the CC-BY-NC-SA 4.0 license.
Maybe it is better to avoid duplication of effort and contribute to OSGL.
You just need to add a "mature" tag to it and a option to filter by it. contributing to it is easy as far as i can tell.
They seem to be a bit more lenient than me. Their list also includes games which depend on non-free assets, as long as the source code is free. Still, I will add this list to the list of lists in the post. Thanks!