[mattnewport]

It is the id model, and it's not without value, it's just short of what I'd really call an "open source game" since so much of a game is about the assets, levels, etc. and not just the code.

I think id's open source code has been great for lots of reasons. I just think there is untapped potential in "fully" open source games where all the assets (including the source assets like Blender files and not just the intermediate formats like .fbx) are open source as well as the code as that makes it easier for people to experiment, learn and remix the content.