20/20/20/20 mode

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)

4/20 mode

When you play the custom night in a FNaF game with every animatronic in the highest activity level. The number varies depending on the game since the number of animatronics always different (ex. 10/20 for FNaF 2, 5/20 for FNaF 4 and 50/20 for Ultimate Custom Night).

No, this doesn't have anything to do with illicit substances. Go consume yours somewhere else.

Lucas: 4/20 mode is so hard in this game! Even the animatronics that are already annoying get worse!
Jeff: what were you expecting stupid