Rez, developed under the codename K-Project, is a video game released by Sega in Japan in 2001 for the Dreamcast and Play Station 2. The Dreamcast version was also released in Europe by Big Ben Interactive in 2002. It was later released in greater numbers and only for the PlayStation 2 in the United States.
Rez is a non-album track by Underworld, originally released in 1993 in the UK. It became one of their biggest club/live anthems despite the fact it could not be found on an album. However, it did appear on many compilations, b-sides, and even appeared on a bonus disc for Second Toughest in the Infants (1996).