20/20/20/20 mode (aka 4/20 mode) was the 7th night in the first FNAF (Five Nights At Freddy's) game. The 7th night was first counted as "The most impossible night in the game." At the time, the creator of the game (Scott Cawthon) thought that the night was impossible to beat. A youtuber mamed Markiplier wss one of the first people to ever beat the night. He had made a strategy that helped him beat the night. And that strategy stuck in the game forever, which was later counted the night as one of the most easiest night 7 in any of the FNAF games as a strategy was used to counter all of the animatronics (Freddy, Bonnie, Chica, Foxy)
-Yo bro, have you beaten 20/20/20/20 mode on Five Nights at Freddy's?
-Who do you think I am, Markiplier? (a youtuber with over 30 million subscribers that does gaming videos, choose your own adventure videos, horror videos, reaction videos, and random videos)