To unlock the safe in The Rook safehouse in Call of Duty: Black Ops 6, you need to solve a series of puzzles. Here is a detailed step-by-step guide to help you unlock the safe:

Step 1: Solve the Piano Puzzle
1. Location: The safe is located in a bedroom on the top level of The Rook safehouse.
2. Puzzle: In the room, you’ll find a piano. Play the piano in the correct sequence to open a secret door to the right, leading down to a hidden basement.
3. Solution: You need to play the piano correctly to unlock the door. This step is crucial as it opens the path to the next puzzles.

Step 2: Solve the Keypad Puzzle
1. Location: After descending to the basement, you’ll find a hallway with a fork in the path.
2. Puzzle: Look to the right to spot a door with a keypad. Use the blacklight to see fingerprints on the keypad, which indicate which keys have been pressed.
3. Solution: Enter a random set of numbers based on the fingerprints. The decryption log on the right will show which numbers are in the correct spot by lighting up green. If a number is highlighted in yellow, it means the number appears in the puzzle but is in the wrong spot.

Example Solution for Keypad:
– The solution is 87878.

Step 3: Solve the Computer Hack Puzzle
1. Location: After solving the keypad puzzle, enter the room.
2. Puzzle: In the back corner, there is a computer for you to hack. There will be three code words to solve.
3. Solution:
– The solutions are:
– BUNKER
– HOLDING
– ROOM
– Enter these code words in sequence to unlock the computer.

Step 4: Solve the Lockpick Puzzle
1. Location: Exit the computer hack room and immediately turn right.
2. Puzzle: At the end of the hall, there is a door to the left. Enter it and continue straight to see another door with a lock that you can pick.
3. Solution:
– Move the lockpick slowly until it glows white. Once it glows white, hold it in place until it clicks. Do this two more times to unlock the door.

Step 5: Solve the Radio Signal Puzzle
1. Location: After exiting the lockpick room, head back down the hallway and make a right at the fork.
2. Puzzle: Continue down the hall and use the key to open the door on the left.
3. Solution:
– Toward the back of the room on a bookshelf, you’ll find a radio indicated by the signal strength icon. Interact with it to turn the frequency.
– Twist the frequency and amplitude knobs until the wavelengths match.
– Once they do, you’ll hear one of several random recordings. If you shine your blacklight around the room, you’ll see numbers painted on several items.
– Based on which recording you got, you’ll need to deduce the correct combination. For example, if you hear a recording like “Ivan switched off the lamp by the broom closet, only the glow of the television remaining. He watched proudly as his country’s flag flashed across the screen.”, you’ll need to identify key words like lamp, broom, television, and flag and their corresponding numbers in the room (e.g., 1, 8, 3, and 6).

Example Solution for Radio:
– The solution is 5024 based on the recording and corresponding numbers.

Final Step: Enter the Safe Code
1. Location: With the code memorized, head back upstairs to the main Rook briefing room.
2. Action: Go up the stairs to the Rook’s second floor and keep following the alcove to the left to reach a door. Open it and you should see a room with a bed and the safe.
3. Solution: Enter your combination to receive your prize, which is $1000 and a Case Crack Blueprint – Melee.

By following these steps, you should be able to unlock the safe in The Rook safehouse in Call of Duty: Black Ops 6.