It's not open source but in the future once the 3rd party game development SDK has been published, community contributed games can be a reality.

The way I've been thinking it could work is that developers can upload their own games to the platform and by default the games would only be visible under their own accounts and in order to play the uploaded game the developer account would have to be in the session.

Then if the developer would like to publish their game for others to play as well they could just check a box. After that the game would go to a "New drops" playlist where players everywhere can test out different new games and rate them at the end. The games gathering most votes would then be upgraded to the main playlists. In a nutshell the system would work somewhat similar to HN frontpage and new submission pools