"Anti-Septic" is a Neurofunk track that was set to play during an unlockable boss fight with AntiSepticEye. However, it was replaced with "Your Bass Nightmare". The song was originally released on March 13, 2016 alongside "Electrified Techno" and "Core".

A remake of this song titled "404" is used as the theme of 6r0wl1n6! 3rr0r in SEVENTEEN: Shining Diamond.