I want to release my game under GPL license, or at least my portion of the source code. Does that comply with Godot license? Next is the artwork. I don't want to use the creative commons license. I want to use something more like GPL. But what about public domain? I like public domain.

What if I release the project under MIT license, the same one Godot uses? Without putting creative commons on the artwork.

Yes godot engines MIT license is compatible with GPL, but it is a one way street. Godot projects that aren't GPL wont be able to benefit as much from your projects developments. If you would like to have a sort of middle ground license then Apache is another one you can consider.

To be able to better advise you though it would be good for you to give a brief explanation of what you want the licensing to accomplish for your project.

In the meantime TLDRlegal is a good resource for a simpler overview of different licenses.

I want people to be able to share it, use it, modify it, as long as it stays free. I would like the same for the artwork. I will have to look more into that. I don't want anyone to be able to close the source code. And i dont' want anyone to license my artwork as their own.

I'm thinking of the GPLV3, I don't know about creative commons.

Ok here it is, GPL V3 and CC BY-NC-SA. I know how to use the GPL, but I don't know how to use the creative commons.

How does the following look?

Godot engine is under MIT permissive license. The below license is for the game, not godot engine. For the game engine godot engine, see the MIT license.

Copyright (C) 2020.

All artwork is licensed under CC BY-NC-SA, Creative Commons V4.0, unless otherwise stated. See link for creative commons, https://creativecommons.org/licenses/by-nc-sa/4.0/

Copyright (C) 2020.

The program source code, except for the game engine and editor, is license under the GPL V3.0 license. There should be an included file with the project with the GPL v3.0 license agreement. See link: http://www.gnu.org/license for more information on GPL V3.0

@newmodels said: How does the following look?

That should probably work! Seems straight forward and easy to find the full license. (keep in mind I am not a lawyer or anything!)