Huge thank you for those nudges! I think I'm back on track, now I just need to collate my data. I'm making progress! 💜

Also, Cyan Worlds has released a video of some actual gameplay!! I'm so very very excited about this. Here's a first look:
   • First Look: Riven Gameplay Reveal | 4k  

Welcome to Riven: The Sequel to Myst! Created in 1997 before 3D environments were possible, this game captured hearts and imaginations alike with it's navigable still images. If you're not familiar, welcome! I hope you enjoy. If you're a nostalgic gamer like me, a very warm welcome indeed!