Flip the lever to unlock the Gemstone Cavern.Starting the next in-game day, you’ll receive two gems daily as a reward for completing the V.A.C indicator puzzle.

Speaking of the Utility Closet, you’ll need that to unlock the Gemstone Cavern. You’ll find hints for the V.A.C. Indicator puzzle in the Mail Room and the Office ’s computer’s emails.

This opens the Gemstone Cavern near the campsite on the Grounds, outside the house. The room itself only has a few notes and doesn’t need to be visited, but unlocking it permanently gives you +2 ...