Internecion Cube Ost - Ic-0n's Theme A -

Unlike most of the series' soundtrack, this track features vocals from IC-0n’s voice actor, Katie Hood. The "lyrics" are primarily rhythmic, melodic "la-la-las" and incessant laughter. This choice is brilliant; it gives the impression of a child-like innocence that is deeply unsettling when paired with the character's god-like destructive powers.

A blend of "wacky electronic nonsense" and upbeat techno with a sinister undertone. Internecion Cube OST - IC-0n's Theme A

It is the most-viewed song in the series, reaching over 6 million views as of 2025. Review: A Chaotic Masterpiece Unlike most of the series' soundtrack, this track