Tweaker, an American electronic music band, was founded in the late 1990s by Chris Vrenna. The group's musical style blended synthpop, progressive rock, modern jazz, and electronica, often characterized by a melancholic sound. Their debut album, The Attraction to All Things Uncertain, was released in 2001. Clint Walsh joined as a permanent member for their second album, 2 a.m. Wakeup Call, released in 2004. Throughout their career, Tweaker collaborated with notable musicians such as Robert Smith and David Sylvian. They composed the theme music for the video game Doom 3 and the animated television show Xiaolin Showdown. The band's final studio album, Call the Time Eternity, was released in 2012.