From the window you crashed through in the Hidden Location above, you’ll see the second hidden area across the way. And if you’re not in that room, you can see your destination from the level with the Central Research Shelter. Either way, you’re looking for a balcony covered in ivy.
Levitate over and smash through the glass to get into the yellow office on the left. Behind that door is a room labeled Lab 10. You can only enter this room if you’ve completed Underhill’s quest. Touching the radio here will call in a swarm of mold.
Control is full of secrets, mysteries and awful Hiss monsters that show up while you’re trying to explore the farthest reaches of the Oldest House. Tucked away inside the shifting Brutalist architecture are several Hidden Locations.This list will show you how to find them.