The single "Katharsis" joined "BoomBoomBoom" as a worldwide club hit,[1] and helped the album stay in the top 10 of the German Deutsche Alternative Charts (DAC) for more than 6 weeks.

[2] The German magazine Orkus called "Feuer frei" was “the new standard for the electro industrial genre”.

[citation needed] While reviewers agreed it was a great album for the dancefloor, some felt it did little more than such, pointing out a lack of variation and originality between songs.

During the Kinetik Festival of 2012, Nachtmahr (along with Combichrist) was criticized on stage by its opening act Ad·ver·sary, who showed, during its last five minutes of its set, a multimedia presentation with examples illustrating sexist and fascist imagery in the music videos and album covers of Nachtmahr.

He also invited the female stage performers from his act to the interview, who likewise rejected the claims of sexism.