One of the deepest mysteries in Roblox Brookhaven RP starts in a place most people ignore: the dilapidated, vine-covered shack on the hill. Players often call this the Plant House or the Abandoned Shack.



While it looks like just a spooky decoration, this house contains the first key to unlocking the Agency's most protected secret: the Quantum Room (also known as the Anti-Gravity Room or the Core). In this guide, we will walk you through how to go from the Plant House to the Quantum Room and read the hidden message waiting inside.

Step 1: Investigating the Plant House

To start this secret quest, you need to find the specific abandoned building. It is not a house you spawn yourself; it is a permanent part of the map.

Locating the Shack

Head towards the Eagle View area (the mountain area). Look for the old, wooden shack covered in green vines and plants. It stands out because it looks much older than the rest of the modern city.

Finding the Clue

Walk inside the shack. It is dark and dusty. Look carefully on the floor or the walls for a piece of paper or a box.

  • In many versions of the secret, there is a note with a Password or a specific Code written on it.
  • Memorize this code (it often changes with updates, but historically has been related to the Agency ID numbers).

Step 2: Entering the Agency Base

The clue in the Plant House points you toward the secret underground Agency. You cannot use the code at the shack; you must take it to the hidden entrance.

The Cinema Entrance

Go to the Mall and enter the Cinema. Walk into the theater room.

  1. Look for the oddly placed vent or the "Authorized Personnel Only" door.
  2. There is often a keypad here. This is where the lore connects.
  3. If the keypad isn't active, use the Cleaners entrance secret (walking through the wall corner) to drop into the base manually.

Step 3: The Quantum Room and the Message

Once you are deep inside the Agency Bunker, you need to find the main power source. This is the Quantum Room.

Activating the Core

Navigate the hallways until you see a large glass window revealing a glowing blue cube or pyramid floating in the center of the room. This is the Quantum Core.

  • Enter the room (you may need the Blue Keycard found in the Police Station vents).
  • Click the activation buttons on the console.
  • Suddenly, gravity will disable! Your character will begin to float in zero-gravity.

Reading the Hidden Message

When the room is active and glowing, look at the walls and the floating screens.
The Message: You will often see strange symbols or scrolling text appearing in Russian or broken English. These messages usually hint at the "Mr. Brookhaven" lore, mentioning experiments, containment failures, or the "dark matter" that powers the city. This is the secret message the Plant House was pointing you toward all along.

Conclusion

The journey from the overgrown Plant House to the high-tech Quantum Room is one of the best adventures in Brookhaven RP. It connects the history of the town with the futuristic secrets of the Agency. Now that you know the path, go activate the core and see if you can decode the message yourself!