Delusions of Grandeur is the fourth studio album by the Norwegian heavy metal band Sahg, released on October 25, 2013, under the Norwegian record label Indie Recordings. It's the first concept album of the band, with the delusions of grandeur theme or megalomania.

Kvitrafn, original drummer of the band, collaborated in recording of "Walls Of Delusion".

An animated music video was made for "Slip off the Edge of the Universe", directed by Alexander Lillevik.

On February 12, 2014, Metal Blade Records premiered the song "Firechild" from the album in North America on the music blog lastrit.es, ahead of its official North American release on February 18, 2014.

Delusions of Grandeur marks a turning point towards a more experimental sound and a psychedelic stoner rock genre, radically different from the traditional heavy metal style of the previous three albums of the band.

The lyrics tells the tale of a man who slowly loses grasp of everything he has learned and experienced throughout his life and enters a vast imaginary state where he experiences increasingly severe delusions of grandeur.

The cover art (created by illustrator Robert Høyem) presents an imaginary astronaut on a psychedelic colorful background and geometric shapes. In this regard, Olav Iversen said in an interview:

All lyrics written by Olav Iversen; all music composed by Sahg, except where noted.

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