The 6 AM sound comes from Five Nights at Freddy's 2, the 2014 survival horror game created by Scott Cawthon. In the game, it plays when the player successfully reaches 6 AM and completes the night. That clear association with relief and survival helped the clip spread in gaming memes, especially in FNaF edits and compilations. It is still popular because even people who have not played the game often recognise it as a quick audio cue for barely making it through a stressful situation, alongside the FNAF Jumpscare Scream.