Sounds Familiar Achievement in Halo: The Master Chief Collection

This Easter Egg can be found on the Multiplayer map, High Grounds.

In order to unlock this achievement, you will need to hear a hidden song while playing on the aforementioned Multiplayer map. In order to hear this song, simply head into the base on the north end of the map and head inside the main computer room. Here, you will notice a large radio tucked underneath one of the computer stations. If you wait around long enough near this radio, the static will fade and Halo: Combat Evolved’s score “Under Cover of Night” will begin to play. Once the song begins to play, the achievement will unlock shortly after.