2011–2013
Insidius is founded in the following lineup: Choina (guitars), Profesor (guitars), Brazyl (bass/vocals), and Żurek (drums). The band begins working on new material.
In 2012, Mori joins the band as guitarist, replacing Profesor, who moves to bass after Brazyl’s earlier departure.
In 2013, Rafał “Tasio” Tasak (ex-Prophecy) joins Insidius as vocalist. With this refreshed lineup, the band continues work on its debut album. A series of live performances — including Festiwal Wspomnień im. Szymona Czecha, Olsztyńska Ofensywa 2013, the 30th anniversary of Vader, and Metalowa Wigilia 2013 — helps Insidius present its music to a wider audience.
2014
Throughout 2014, the band focuses on preparations for the production of its debut album, while also playing several live shows. During this period, a lineup change takes place behind the drums: Żurek leaves the band and Michał Andrzejczyk (Deithwen) joins as his replacement.
2015
In 2015, Insidius performs at Festiwal im. Szymona Czecha, Covan Wake Up For Us, Grill’n’Grind, and Sun Dies Festival #2. In the fall, the band enters Hertz Studio with the completed material for its first full-length release. Drum tracks are recorded there, and Hertz also handles the album’s mix and mastering.
2016
The first single, “The Final Journey,” is released to promote the album Shadows Of Humanity. A music video for the track is produced by Exploited Media. On April 29, 2016, Insidius officially releases Shadows Of Humanity as an independent album.
Songs from the record are presented live at events such as In Your Face #3, Thrash Attack #15, Death is Coming to Your Town, and Imperium Poloniae 2016. Toward the end of the year, the band returns to the rehearsal room and begins work on its second album.
2017
Mori leaves the band and is replaced by Lasota (Varmia), a musician from Olsztyn. Work on the second album continues through the end of the year.
2018
Insidius enters Hertz Studio for the second time to record new material. The work is completed by the end of July.
In March, one of the band’s founders, Profesor, leaves the group and is replaced on bass by Łukasz “Jankes” Usydus (ex-Soul Skeleton). The guitar section also changes, as Jakub “Janus” Janowicz (ex-Northern Plague) takes over from Lasota.
Promotion of the second album begins with the “XXXV Years of Chaos” tour, during which Insidius has the honor of performing alongside major metal acts such as Vader, Marduk, and Arkona. The tour covers nine cities across Poland.
2019
In the spring, Insidius embarks on the Godless Infamia Tour alongside Disloyal, performing in Poland, Germany, Lithuania, and Romania. This marks a period of intensive touring and the band’s broader international exposure.
2020–2023
Work on the next album begins gradually and continues without haste, accompanied by occasional live performances. During this period, Insidius shares the stage with acts such as Azarath, Decapitated, Materia, Trauma, and Yfel1710.
The period culminates in two editions of the Revelations of the Wicked tour alongside Vader.
2024
At the beginning of the year, the band enters Heinrich House Studio, where intensive work begins on the third album, Vulgus Illustrata, under the guidance of Filip “Heinrich” Hałucha. Final mastering is completed in September, and by the end of the year Insidius signs with the Swedish label Black Lion Records.
2025
Vulgus Illustrata is released, preceded by a lyric video and two music videos created by Robert Gasperowicz. Insidius promotes the album on the Orgiastic Tour, performing alongside Yfel1710, Feto in Fetus, and other acts.
2026
The Orgiastic Tour continues with Yfel1710, while Insidius remains focused on promoting the new album and expanding its live presence.
Current lineup:
Vocals: Rafał „Tasio” Tasak
Guitars: Tomasz „Choina” Choiński
Guitars: Jakub „Janus” Janowicz
Bass: Łukasz „Jankes” Usydus
Drums: Michał Andrzejczyk
