E-200 is a lettered entity name from the Roblox Rooms style horror scene, where numbered entities appear, threaten the player, and then despawn. Clips of their sounds are shared separately as soundboard effects because players recognise them instantly without needing the full gameplay footage. This despawn cue circulated as a short recorded clip, just over four seconds long, and is now reused outside the game in edits and memes. Its appeal comes from familiarity for Roblox horror fans and its usefulness as a quick disappearance sound for anyone else.