Yes, you can indeed destroy walls in Blue Prince. You'll probably notice these odd fixtures in certain rooms--it seems that the walls are weakened or about to collapse. The only way to see what's behind these barriers is by finding the right tool. Before we continue with our guide, please be reminded that we're going to mention some minor spoilers.
How to destroy walls in Blue Prince
You can destroy walls once you've found a Power Hammer. Compared to the reliable Sledge Hammer that can break open locked trunks/chests, the Power Hammer is a beefed up contraption that smashes through weakened brick walls.
Note: You lose all items each day/reset. As such, we recommend placing them in the Coat Check so you can retrieve them in a future playthrough.
How to craft the Power Hammer

The Power Hammer can be crafted via the Workshop, which is one of the best rooms to have in the manor. Here's what you need:
- Sledge Hammer - Can sometimes appear in dead-end rooms, green rooms, and the Toolshed outer room. Alternatively, you can purchase it from the Commissary if it's available.
- Broken Lever - Usually left behind on the Security desk and on a crate in the Spare Room.
- Battery Pack - Most of the time, we've seen the Battery Pack on the Workshop table.
Where are the breakable walls in the manor?

Now that you have something that can destroy walls in Blue Prince, it's time to do a bit of redecorating by smashing up some rooms. Unlike many effects, smashing walls is a permanent change to any areas you impact. Here are the locations that you want to visit:
- Secret Garden - Reveals another valve. Rotate all three wind vanes to point to the east so you can unlock one Antechamber door. Rotating all the valves to the south, meanwhile, ...