====Keyboards====
*[[Charlie Clouser]] (1994-2001) (Also played theremin on the Fragility Tour, some drums on the [[Dissonance]] Tour)
*[[David Haymes]] (1990) ([[Automatic Tour]], [[Deep Tour]] only, replaced by Mars)
*Brian Liesegang (Replacement for Mars for a few nights; helped in the studio on ''Broken''; featured in one of the music videos for "[[Gave Up]]")
*[[Lee Mars]] (1990-1991)
*[[Nick Rushe]] (1990) ([[Automatic "Pretty Hate Machine" Promo Tour]] only, replaced by Haymes)*[[Gary Talpas]] (1989) ([["Pretty Hate Machine" Promotional Tour|Pretty Hate Machine Promotional Tour]] only, replaced by Rushe; also the original NIN art director)*[[Chris Vrenna]] (1988) ([[VIVIsectVI Tour]] only, replaced by Talpasand Rushe)
*[[James Woolley]] (1991-1994)