https://clover.moe/spearmint/
https://github.com/zturtleman/spearmint
https://www.phoronix.com/scan.php?page=news_item&px=Spearmint-1.0-Next-Month
"Spearmint, an enhanced version of the open-source ioquake3 engine in turn derived from the id Tech 3 source code, will see the big "1.0" milestone in October. But that will also coincide with the developer and ioquake3 maintainer ceasing work on this engine now with an eighteen year lineage.
Next month will be 10 years that developer Zack Middleton has been involved with the open-source Quake 3 engine scene and one of the maintainers of ioquake3. Over this time he's worked on the Spearmint engine along with various other engine mods and games. He was also the developer behind the ioquake3-powered turtle fighting game."
I'm most excited by the improved AI.