are a German extreme metal band formed in 2008 by Dominik Goncalves dos Reis (vocals, guitar) and Anton Lisovoj (vocals, bass). Their current lineup is completed by drummer Michael Kadnar and guitarist Peter Wolff. They have released six studio albums, transforming their initial crust punk sound through the incorporation of black metal, doom metal, and post-rock influences.
Downfall of Gaia's style, initially firmly rooted in crust punk, and then increasingly characterised by "longer, more grandiose, back-and-forth sweeping songs" has evolved over the course of their career. Following the 2014 release of Aeon Unveils the Thrones of Decay, it has been described as "experimental, sludge-infused black metal ... mixing second-wave black metal influences with progressive and atmospheric elements", as well as a "blend of post-metal riffs and black metal intensity" and "a mix of black metal, crusty grind bursts, sludge, and sprawling, sometimes doomy, post-metal". The band has been compared to Fall of Efrafa, Altar of Plagues and Agrimonia.

Around the same time, Dominik Goncalves dos Reis described the band as influenced initially by d-beat and crust punk and later mostly by doom metal, sludge metal and black metal, naming Agalloch, Neurosis, YOB, Electric Wizard and Wolves in the Throne Room as personal favorites, and Altar of Plagues, Watain, Thy Light and early Ulver (besides Wolves in the Throne Room and Agalloch) as the band's black metal influences. In 2012, he stated that Cult of Luna, Rosetta, Altar of Plagues, Neurosis and Mono were among their biggest influences. However, he noted on both occasions that they enjoy a wide variety of music genres, "from pop to electro to indie", one of his all-time favorite albums besides The Eye of Every Storm by Neurosis being Untrue by electronic musician Burial.