I've decided I'm going to demake Fallout 4. Going to use Voxel like graphics, and going to be a 3D top down camera. I think I'll call it There Be Bombs, at least that is the code name if nothing else. I'm going to use Xenko 3 to make the game (Now MIT open source) because it makes things easier, and faster. I already did some prototyping in it to make sure I could do this in a few days.
I think just doing one indoor area for the jam, and later add outside, and many more areas as time goes on.
Wish me luck!