.detuned is a 2009 interactive art video game developed by German demogroup .theprodukkt and published by Sony Computer Entertainment for the PlayStation 3.

It was initially released on September 17, 2009, in Japan as .detuned: Gumi Senpai no Fushigi Kūkan (デチューンド グミ先輩の不思議空間, Dichūndo Gumi Senpai no Fushigi Kūkan, lit.

.detuned features a man sitting in a chair surrounded by a psychedelic environment.

The player can switch into various modes, and using the trigger buttons and right analogue stick, apply certain effects on the man, which e.g. make his head shrink or apply a post-processing filter on the visuals and music.

IGN cited the lack of lasting appeal as the biggest problem about .detuned, saying that "selling for $2.99 in the US PlayStation Store, that's about a dollar per minute of entertainment".