Lunarpunk Games is "preparing the Midnight Market, a boutique-style virtual market that lasts for only 3 nights (72 hours). The Midnight Market will offer a small, limited selection of games that can't found elsewhere."
Announcement here 

Currently there is no date and time, but this site will be updated when that happens.

Have a game and want to apply for the market? Click here

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For more information head to https://www.lunarpunk.games/