My notes on Mysterium 2024:
Forgot to include: Robyn Miller has posted the soundtrack for Riven 2024, including new tracks, on Bandcamp and the usual streaming services.
https://robynmiller.bandcamp.com/album/riven-original-game-soundtrack-remastered-2024
The Bandcamp download includes a scan of a very early Riven development map! Hand-drawn, not very similar to (either) released game.
@zarfeblong Thanks for the report!