Incredible Expanding Mindfuck, commonly abbreviated as I.E.M., was a solo project by Steven Wilson (the lead of British rock band Porcupine Tree).

The name "Incredible Expanding Mindfuck" is an in-joke referring to early Porcupine Tree promotional material (in which Porcupine Tree was given an entirely fictional 1970s history and in which the Incredible Expanding Mindfuck was mentioned as a related project).

is in part a continuation of the experimental psychedelic sound which he initially mastered with Porcupine Tree before steering the band towards a more mainstream rock direction with the Stupid Dream album.

recordings are played by Wilson (although other contributors have included former Bark Psychosis drummer Mark Simnett).

Each CD is packaged in its own Japanese-style mini LP sleeve within a hardback slipcase box.