The album The Attraction to All Things Uncertain was Vrenna's "solo" debut[1] and it was not until the follow-up album, 2 a.m. Wakeup Call, that Clint Walsh was announced as a permanent fixture to the band. While Vrenna and Walsh supply most instruments and electronics, many other musicians contributed to Tweaker's performances and recordings, including Robert Smith, David Sylvian, Burton C. Bell, Craig Wedren, Will Oldham, Hamilton Leithauser, Buzz Osborne, Jonathan Bates and Johnny Marr. The subsequent albums followed a preset central theme.
Tweaker wrote and performed the theme music to Doom 3, of which the theme song was released via the band's website. The rest of the soundtrack is accessible from the game's files. Tweaker also composed the theme music for the animated television show Xiaolin Showdown. Unlike the band's usual synthpop, shoegaze, modern jazz, Dark Ambient and industrial sound, the Doom 3 theme was mainly heavy metal.
In 2004, Tweaker opened for Skinny Puppy on select dates with a full live band, consisting of Chris Vrenna (drums, percussion and keyboard), Clint Walsh (guitar and keyboard), William Faith (bass guitar) and Nick Young (vocals). They performed everything live (i.e., no pre-recorded tape), although they did have to alter some of their songs to fit the live format — the most extreme case being a completely revamped rock version of "Microsize Boy". The final performance on the tour was at QuakeCon 2005 in Dallas, TX.
