I'm really interested to see where this goes. I love the unsettling tone of the podcast, and it will be challenging to try and recreate that as an rpg. I think one thing that will be difficult is concluding stories in a way that is satisfying to players. Many of the mysteries in The Magnus Archives don't get resolved, they just "are". That's fine for a fine footage audio story, but players will be driven to keep going until they solve it.