Interminable Rooms is a Roblox horror game inspired by the Rooms format, where players push through long stretches of numbered rooms while avoiding hostile entities. Its entities are grouped into sections, and the E section gives its cast E-prefixed names, including E-200. Clips tied to those entities circulate outside the game as isolated cues, shared by fans who recognise the sound from encounters and use it in edits without any gameplay footage. That recognition is why the cue still works as instant horror shorthand.