Hey I realize this is the non-commercial collaboration but this could be interesting for you that have passion projects or other projects just for fun,
I am in charge of an interactive sound course where we teach audio students to implement sound into games and other interactive media. What we need are some good looking scenes/ or games with different themes and mechanics that we can use to show the sound implementation process. We do not need an exclusive license (so it is OK if the game will be or is released or used for other purposes) we simply need to license the right to use the material and for our students to able to showcase the projects on their showreels (with proper credits given of course).
If anybody is interested please drop me a line and we can discuss it further!