After recently releasing the first major post-release update, the developer of the action-roguelike Burning Knight decided to open source the whole thing.
What is it? Similar in action to the likes of Nuclear Throne, Enter The Gungeon and a little Isaac sprinkled in and others like it - you get to blast through procedurally generated dungeons while unlocking more and more items to play with. Various different weapons and status effects, hats to collect and much more hidden.
It released back in June 2020, check out some footage below:
If you wish to read some behind the scenes info, we did an interview with the developer back in July that's worth a read. Catching up with Egor again when this open sourcing was announced on October 8, they said to us that it still didn't go well financially for them but by open sourcing it "hopefully someone will find something useful and learn from it" and they noted to us that when they were starting out something like this "would've helped me a ton" - so they're doing it to give back.
Thanks to this you can now find the whole source, including the media assets under the GPL on GitHub. Technically, that actually makes the game entirely free with this being what is currently on Steam right now.