@SuperDicq barotrauma is also a game with a similar license. It's a source available paid game and paid software.

While I don't have any personal opnion of source-available paid software like that. From reading the CONTRIBUTING and LICENSE of grayjay, it seems way more draconian than the one on barotrauma. As they don't accept contributions to the core and other parts of it


https://github.com/Regalis11/Barotrauma