https://www.gamespot.com/articles/call-of-duty-black-ops-4-players-experience-the-ga/1100-6462470/

Call of Duty: Black Ops 4 is already in the hands of some players at home, with a full release on PS4, Xbox One, and PC on October 12. A handful of players, on the other hand, got a unique gameplay experience instead. They got to try the game at the Black Ops House in London, inside "the world's darkest room" for a totally immersive CoD experience.

Activision partnered with a company called Surrey NanoSystems to design the room, which is covered in Vantablack VBx2 coating, a material that absorbs nearly 100 percent of natural light in an area. The end result for the players was the ability to play the game with absolutely nothing being visible in the room except the screen and game in front of them. Get a look at their creation in the video below.