How to open the basement at the old KGB safe house in Black Ops 6 campaign

The Call of Duty: Black Ops 6 campaign is live, and it's an immersive experience right off the bat. Your own KGB safe house at the start of the campaign is filled with puzzles. Completing them grants you an achievement, a trophy, the Case Cracker melee weapon blueprint, and, most importantly, $1,000 (in-game cash) that allows you to upgrade your safe house. But first, you will need to open the basement doors, which is a puzzle itself.

This article will guide you through the entire process of making the basement accessible at the old KGB safe house in the Black Ops 6 campaign.

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How to open the basement doors at the KGB safe house in the Call of Duty Black Ops 6 campaign

Before starting on your first puzzle in the Black Ops 6 campaign, it is important to note that you have to unlock two doors to get access to the basement. We shall start at the first door, which is located right beside the piano. You can find the steps to unlocking it below.

Piano room puzzle hints on the walls (Image via Activision)

• Step 1 - Navigate to the piano room.
• Step 2 - Find and pick up the black light located on the table next to the piano.
• Step 3 - Turn on the black light and flash it on the walls of the piano room. You will find a bunch of codes (written in Russian) with numbers that denote their order. These codes will be accompanied by arrows to guide you to the next one.
• Step 4 - Note down the codes in the right order.
• Step 5 - Move to the piano and interact with it.
• Step 6 - Keep the black light on to locate the piano keys that correspond to the codes you found earlier.
• Step 7 - Play the notes in the order of the codes.

Piano puzzle codes and their corresponding keys (Image via Activision)

If you have followed the process correctly, a door should have opened up right beside the piano. It leads to the basement, which is unfortunately locked behind another door. To open it, follow these steps:

Boiler room puzzle (Image via Activision)

• Step 1 - Navigate to the boiler room in the safe house.
• Step 2 - Locate the following three things: Fuel Valve (left), Boiler Valve/Water Line (middle), and Pilot Light (right).
• Step 3 - Move to the Boiler Valve and turn the water off.
• Step 4 - Move over to the Fuel Valve and turn it until the pointer to its left is at the halfway point.
• Step 5 - Move to the Pilot Light and interact with it. It should turn and stay green if the previous steps have been followed correctly.
• Step 6 - Move to the Boiler Valve and turn it on fully.

Boiler room puzzle Fuel Valve (Image via Activision)

The boiler should now remain on, keeping the final basement door unlocked. You have now successfully gained access to a area in the old KGB safe house and can move on to the rest of the puzzles in the Black Ops 6 campaign to earn your initial campaign rewards.