Hi. Todd. Sitting down for this one, appropriately.
Following the producer's discovery of the single room marked 'Demo,' a QA tester has found a second door behind it, marked 'Demo (Final).' Behind that door is a chair. Just a chair. No walls beyond it, no floor to speak of. Simply a chair, rendered to 16x the detail, waiting. It has its own subreddit. It has more wishlist adds than the game.
Marcus update: he has reached a river. He refuses to turn back. He is constructing a raft from procedurally generated reeds. His last message read: 'still grass, now also water.' Godspeed, Marcus.