This Place at the End: An Apocalyptic RPG Demo

Concurrent players on Steam, one reading a day — but readings were taken at different times of day, spanning 14 hours, and Steam concurrency runs about 1.8x higher at its daily high than at its low — so some of the movement across that stretch is the clock, not the game.

Shaded: Steam sales and festivals this game was in (the Events tab has each one).