Goodnight Detective comes from Disco Elysium, the 2019 role-playing game in which Kim Kitsuragi serves as the steady lieutenant and partner to the player's troubled detective. The line captures the game's quieter character writing, which is why it travelled beyond playthroughs onto soundboards and short video edits. Fans use it as a recognisable sign-off because it instantly evokes Kim's dry, loyal presence without needing any wider plot context. Its brevity and calm tone have kept it useful for creators who want a gentle ending rather than a loud meme punchline.