Durple is one of the characters from Sprunki, a fan-made music game inspired by Incredibox in which players combine character sounds to build songs. Phase 5 is the game's darker horror-themed version, where familiar characters take on unsettling designs and heavier sounds. This short loop comes from that phase and has circulated through fan videos, edits and soundboards, where listeners recognise Durple by the mood as much as the melody. Its popularity comes from that shared fan language, making it a quick shorthand for the darker side of Sprunki.