The album was released in various formats with slightly different track lists. In the UK, there was a 2CD version and a single disc edition, and the vinyl was released in both 4LP and 5LP versions. Of the two vinyl versions, the most common pressing is the 4LP version comprising most of the first CD; the 5-LP set includes tracks from the second CD, replacing "Intro" with "Heroes" and "Digital", which are appended to the end.
In the US, only the 2CD version was released, though this contained the bonus track of "Electricks".
New Forms was released to generally favourable reviews. AllMusic described the album as "the major statement on drum'n'bass", while in 2010 BBC Music noted that it "carved a mainstream niche for drum and bass like no album before it".Pitchfork Media's Ryan Schreiber was less generous, commenting that the album "doesn't really get decent until the second half of disc one".
New Forms² is a 2008 remake of the original New Forms album. Roni Size has described it as having a "new coat of armour added to the original tracks". The album contains four new songs: "Heart to Heart", "Less is More", "Don't Hold Back" and "Encore", while omitting several of the songs from the original pressing. The majority of the record features edited versions of previous tracks, with segues throughout. The most drastic cuts occur to "Brown Paper Bag" and "Let's Get It On", which are reduced by over five minutes each; the latter becoming a simple ambient interlude.