What game formats are allowed for this jam?

I had a thought for a TTRPG, but I note that you say you're planning on streaming entries at the end of the jam, so mine may not be appropriate in that case.

At the end you shoud do the game you're most confortable with. I'll try to find people to play the game if needed but if I can't i'll just go though the game and the rules in the stream :)