Tekisasu maintains its own branch of the wonderfully awesome Godot Engine, which we reference internally as the Tekisasu Engine with naming changes to not interfere with upstream builds and add some patches we want to adopt that either have not yet been accepted to upstream or patches that were rejected.
Because we’re using our custom branch specifically for our own game development and we’re a small company, we’re not interested in offering third party support to our branch, offer it to other developers, or take away focus on the upstream Godot project. If there’s any patches that you’d want to contribute to Tekisasu Engine, we’d much rather you contribute them to upstream Godot. If they’re accepted there or rejected but something we want, we’ll gladly backport it to our branch like many others.
If you want to use Godot, you should either use genuine Godot (https://godotengine.org/) or maintain your own branch. If you are interested in our branch management process or build system to use for your own project, we are more than happy to share our repository with you! Just send an email to john.knight@tekisasu.com with your request for Tekisasu Engine access as well as your Github username and we’ll happily allow you to fork or branch (though we do not offer support for it).