Trallery started in late 2009 when Sebas joined the Metallica tribute band White Shadow, which already included Biel and Humberto. In early 2010, the band held their first concert with the current three members, and shortly after, they decided to rename themselves Trallery and focus on composing original songs. In 2010, the band performed concerts primarily featuring classic Thrash Metal covers while beginning to introduce their own compositions.
Throughout 2011 and the first half of 2012, Trallery dedicated themselves almost exclusively to Metallica tribute concerts to fund the recording of their first album, while continuing to develop their own songs. In the summer of 2012, they rehearsed intensely to finalize the tracks they would record in the studio in early September.
After "Catalepsy," Trallery have release two more albums: "Spiritless" in 2016 and "Isolation" in 2019.