Looking for the episode Day9 describes the ideal game he'd like made

There was an episode awhile ago on his youtube channel in which Day9 describes an interesting idea he had for a game he is either making or wants to be made.  I remember it was something along the lines of a game that had different chapters/parts of the story/game made by completely different people.  Almost like the development would be crowdsourced at different parts.  Does anyone remember what episode he describes this in?  Or does anyone have any news on if this project is being worked on?