Black Ops 6 is the latest entry in the juggernaut shooter franchise. It brings the long-running Black Ops sub-series to a Gulf War setting — a first for Call of Duty — and adds a new movement system called omni-movements.

Call of Duty pros have had a lot of good things to say about Black Ops 6 so far, but there’s one major problem that could prove to be huge.

Black Ops 6 features a safe in the Rook safehouse that requires the player to solve several puzzles to unlock. Here's everything you need to know.