The Aetheria Game Engine (github.com/komoku/aetheria) satisfies all of the conditions you mention.
In https://intfiction.org/t/if-in-another-language/6393/7 you can see a summary of features.
The Aetheria Game Engine (github.com/komoku/aetheria) satisfies all of the conditions you mention.
In https://intfiction.org/t/if-in-another-language/6393/7 you can see a summary of features.