Changes

Available on a promotional-only "special DJ edit" UK vinyl pressing. It was also widely circulated on the ''Demos & Remixes'' [[bootlegs|bootleg]].

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A demo for "Sin" does exist, but it has only leaked in short clips on the internetbefore leaking in full in 2025. It exists The leak stated: "this demo from 1987 was included on a cassette tape handed out tapes distributed by Reznor to important figuresbefore securing a record deal."  Per the clips that had leaked earlier, there is an alternate version of this demo that uses the same instrumental but a different vocal take. This Based on what fans have heard, this is the version that is on a cassette is also in the possession of [[Martin Atkins]], who has allowed fans to hear excerptsplaybacks.

The song's intro seems to be performed differently by every [[NIN]] keyboardist. For example, [[Danny Lohner]] in the [[Woodstock '94]] performance is seen playing an additional melody to the intro. During the [[Fragility]] tour, [[Charlie Clouser]] used a theremin before the guitar intro is played, while [[Alessandro Cortini]]'s performance of the intro is a tad closer to the original.  Other than that, the rest of the song is performed closely to the album version in most live performances, though when [[Jeordie White]] played the song, he played its harmonic progression on bass guitar rather than the keyboards used in most other live arrangements.  The persistent high-pitched percussion loop from the "Long", "Short" and "Dub" mixes is also usually present in the live iterations. It was performed semi-regularly as a remixed/mash-up version in collaboration with [[Boys Noize]] on Act III of the [[Peel It Back Tour]], using Boys Noize's song "Cerebral" as the base, usually being the final song for Act III.