Gigan is an American experimental death metal band. Characterized by their heavy psychedelic elements, the one-of-a-kind guitar style of their mainman Eric Hersemann, and the incredible complexity of their drum arrangements, they have become a cult favorite over the years.

Formed in 2006 by Eric Hersemann (guitar, bass, synthesizer, theremin, xylophone), Randy Piro (guitar, vocals), and Grover Norton III (drums) shortly after Hersemann left Music/HateEternal, the band wasted no time in self-releasing the ''Footsteps of Gigan'' EP in 2007, though Norton quickly left and was replaced by Danny Ryan, and a debut full-length, ''The Order of the False Eye'', was released in 2008. Assorted touring dates followed, including a tour supporting Belphegor and Neuraxis, along with a lineup change that resulted in the departure of Piro and Ryan and the welcoming in of John Collett and Kesava "Kaish" Doane, as well as a deal with Willowtip Records. ''Quasi-Hallucinogenic Sonic Landscapes'', their second full-length, followed in 2011, followed by more touring, though Collett and Doane quit in 2013 and were swiftly replaced by Eston Browne and Nate Cotton, and with that lineup came ''Multi-Dimensional Fractal-Sorcery and Super Science'' that same year. Having just finished up a brief tour, there's almost certainly more to come.
* ''Footsteps of Gigan'' (2007) - EP
* ''The Order of the False Eye'' (2008)
* ''Quasi-Hallucinogenic Sonic Landscapes'' (2011)
* ''Multi-Dimensional Fractal-Sorcery and Super Science'' (2013)
* ''Undulating Waves of Rainbiotic Iridescence'' (2017)
This band contains examples of the following tropes:
* EldritchAbomination: A common lyrical topic.
** The name comes from a beast in Franchise/{{Godzilla}}, so it doubles as a MeaningfulName.
* EnergyBeing: "Transmogrification into Bio-Luminoid"
* IAmTheBand: Eric Hersemann.
* MohsScaleOfRockAndMetalHardness: Low to mid 10 for their entire career.
* NobodyLovesTheBassist: They don't even ''have'' a full-time bassist. Eric handles it on the albums, while they use session players for live shows.
* OneOfUs: Eric Hersemann, but really, the fact that the band is named after a kaiju should clue you in.
* PromotedFanboy: Eston Browne.
* RevolvingDoorBand: In the seven years they've been around, they haven't had a lineup last for more than one album.
* RockTrio: In-studio. They use session bassists for live shows.
* ScaryBlackMan: Eston, at least onstage.
* SignatureStyle: Tons of odd time signatures, effects-laden guitar riffing, ridiculously complex drumming, lots of weird psychedelic soundscapes, and the occasional noodly bit.
* StartMyOwn: Eric quit Hate Eternal to form Gigan.
* TechnicalDeathMetal: Of the mathy, screechy Gorguts-esque branch.
* UncommonTime: Common time is a rarity here.