I've seen some interesting rules-based design games that are more process-based art than games. One of the co-creators of Paper JS [http://paperjs.org/] is a member of this group of artists.

Some are based on 3-4 participants https://www.conditionaldesign.org/

Some work with an arbitrary number of participants, e.g. visitors adhering stickers to art gallery walls and floor (see "red fungus"): https://web.archive.org/web/20100829051147/http://poly-luna....