Pretty Hate Machine Tour Series was a series of concert tours in support of Nine Inch Nails' debut album Pretty Hate Machine. The series took place over much of North America and Europe from 1989 to 1991. During this time, the band's line-up mainly consisted of Trent Reznor on vocals and guitars, Richard Patrick on back-up vocals and guitars, Chris Vrenna on drums, and a hired musician usually to play keyboards. The series consisted of eight tours, spanning Skinny Puppy's VIVIsectVI tour to a tour of Europe for the band.