Bloons TD 6 is a tower defence game by Ninja Kiwi, released in 2018 as the sixth main entry in the Bloons TD series. Its defeat cue became familiar to players after countless lost rounds on harder maps and modes. Clips of the groan later spread to soundboards and short video edits, where it was separated from gameplay and reused as a standalone lose sound. It remains popular because Bloons players recognise it instantly, while other viewers still understand the long, flat groan as a simple signal for failure.