Changes

| versions =Reptile<br>Reptile (Instrumental)<br>Reptilian<br>Underneath The Skin<br>Reptile (''[[And All That Could Have Been (halo)|And All That Could Have Been]]'') DVD<br>Liar (Reptile Demo)

}} '''"Reptile"''' is the twelfth track on 1994's ''[[The Downward Spiral (halo)|The Downward Spiral]].'' This song is characteristic of the band's early 90s "industrial" sound, as it opens with an eerie, quiet machine-like sound collage that transitions into a nearly identical-sounding musical composition. Allegedly, it is a sample of a machine that slaughters pigs, though no sources have been found that indicate this.

This is the original album version. Characteristic of the band's mid-90s industrial rock sound, it opens with an eerie and quiet machine-like sound collage that transitions into an imitative musical composition. The structure, repetitive in nature, contains three distinct but similar sections, all driven by machine-like percussion loops and undulating rhythm guitar and synthesized bass. The choruses reflect a brighter mood with prominent melodic synthesizers and glimpses of guitar. The three sections are joined by two quiet instrumental breaks, a technique used later on "[[Even Deeper]]." ===Reptile (Instrumental)===Released by Reznor via his remix.nin.com account, this unmastered instrumental version is identical to the album version, save the lack of vocals and transitions to or from other songs.

This version has more loop layering, no intro, and instrumental choruses after the regular choruses. 

This version is an almost-a mostly instrumental mix that has modified instrumentalsmanipulates many of the rhythmic elements and synthesizers, also adding other layers of loops. 

Relatively This demo is relatively the same as the version that found its way onto ''The Downward Spiral'' throughout the intro and verses, however but the chorus is somewhat altered featuring features a dancier more danceable beat and different vocals layered over. The song's "transition" happens at 1:00 instead of 0:57.

This live version is an Easter Egg on the DVD version of ''And All That Could Have Been.'' and is generally more guitar-heavy than the studio version. Reznor is barely audibly whispering "pig" as the intro fades in, showing that the song's place in the tracklist is between "[[March Of The Pigs (song)|March of the Pigs]]" and "[[Piggy]]."He also adds lyrics during the quiet breaks. It and other hidden content can be found via the "Beneath The Surface" menu hidden on disc two, accessed during "Head Like A Hole" at the 11:20 mark by pressing 7 (or 6 for some copies) on the remote, then Enter.

The song has always been performed with the beeps beep melody as an introduction, though sometimes without the machine loop collage. During the breakdownsecond quiet bridge, Reznor often sings "please don't hurt me," followed by a desperate cry. Recently on On the [[Year Zero Warm-Up Tour]], the intro is was further extended with a more articulate sound and Reznor whispering over it.

This song was also reworked and featured in the [http://www.nin.com/current/radioshows/index.html Boston, MA radio performance], ([[Peter Murphy]], Reznor, [[Atticus Ross]], and [[Jeordie White]]) on June 23, 2006.