Under the Igorrr alias, he combines a variety of disparate genres, including black metal, baroque music, breakcore, and trip hop, into a singular sound.

The Igorrr project became a full band with the addition of vocalists Aphrodite Patoulidou and JB Le Bail, drummer Sylvain Bouvier, guitarist Martyn Clément and bassist Erlend Caspersen.

[1] He named his band after a pet gerbil called Igorr that he had as a child, adding the extra "r" to "make it harder to pronounce.

[2] Igorrr self-released a demo album, Poisson Soluble (2006) and Moisissure (2008, Acroplane Recordings),[3] which gained the attention of label Ad Noiseam.

[28] The live show features drummer Sylvain Bouvier and vocalists Laure Le Prunenec and Laurent Lunoir, alongside Serre on vocals and programming.

[43] Igorrr's sound combines breakbeats, heavy metal riffs, extreme tempo changes, and operatic singing coupled with screaming/growling, among other elements, to create what AllMusic describes as "an intense, disturbing, and undeniably distinct experience".

"[52] Serre listed classical composers Frédéric Chopin, Johann Sebastian Bach, Jean-Philippe Rameau, and Domenico Scarlatti, alongside contemporary acts Taraf de Haïdouks, Cannibal Corpse, Meshuggah, Aphex Twin, Mr. Bungle (as well as other Mike Patton projects),[2] and Portishead as influences in the early days.

Their first self-titled album was on the label Blood Music and recorded at Improve Tone Studio in Lezoux, France.

[5] Igorrr composed half of the soundtrack to the musical film Jeannette: The Childhood of Joan of Arc directed by Bruno Dumont.