Originally formed in 1979 as a straight-up heavy metal act, France's Nightmare would see their fortunes flag by 1987, and the band went on hiatus until re-forming in 1999 as a more power metal-centric band. Nightmare attracted their first real bit of attention after a storming opening support gig for then-chart-topping metallers Def Leppard in Grenoble. The show caught the attention of Ebony Records, who quickly signed guitarist Jean Strippoli, guitarist Nicolas De Dominicis, bassist Yves Campion, and drummer Jo Amore to a deal. Their debut, Waiting for the Twilight, was released in 1984, and was followed by the acquisition of vocalist Jean-Marie Boix, who replaced outgoing singer Christophe Hupert. Power of the Universe, Nightmare's sophomore full-length effort, was to be the last gasp of the first phase of the French band, as a series of events conspired to keep the group's momentum from going forward. First was the demise of their new label, Dream Records, which was soon followed by the departure of vocalist Boix, who had to leave the band for medical reasons.
Nightmare went through a major roster shakeup, leaving only Campion and De Dominicis from the original five-piece. A demo with the new lineup was hashed out in the studio, but the band was unable to regain its momentum, and fell silent. The year 1999 brought both good news and bad news for fans of the French (now) power metal band, as it saw them return to the scene with the EP Astral Deliverance, but would also see the band lose a former member with the tragic death of vocalist Boix later in the year. With re-releases of the band's early work in shops, Nightmare pressed on and released the double live Live Deliverance in 2000. With the reunited band now performing and recording regularly, Nightmare signed to Napalm Records in 2000, and in 2001 the band released album number three, Cosmovision. Silent Room followed in 2003, after the group had spent much of 2001 and 2002 on the road and at festivals galore, sharing stages with such acts as Saxon and Judas Priest.
Nightmare released the album The Dominion Gate. With 2006 having been mainly reserved for a great deal of performing and touring, Nightmare entered the studio in mid-2007 for album number six, and the then-current members -- vocalist (and former drummer) Jo Amore, guitarist Franck Milleliri, guitarist Alex Hilbert, bassist Yves Campion, and drummer David Amore (brother of vocalist Jo) -- worked quickly to produce that year's Genetic Disorder. In 2009 the band released the well-received Insurrection via German metal powerhouse AFM Records, with whom they would also issue subsequent offerings Burden of God (2012), Aftermath (2014), and Dead Sun (2016).