The Call of Duty: WWII Private Beta Weekends is almost at its end but Spotify has a special treat for you hidden in the game.

If you’ve been playing you might have noticed the “super-secret” Spotify codes hidden in certain game maps like you see above.

The codes, when found will reveal cryptic audio messages, featuring voices from the Call of Duty: WWII campaign cast for players to decipher.

Activision is literally the first company to partner up with Spotify in this way in an alternate reality gaming (ARG) capacity by incorporating code-breaking puzzles in this manner.

Codes are deciphered by the Spotify mobile app which in turn revealed a five-letter code that can be entered into the the Call of Duty: WWII Classified site for an exclusive in-game Calling Card that can be used when the full game drops on 3 November.

Good luck!