Music in the Creatures series of games started out in Creatures as a variety of synthesized chimes, chords, bloops and other non-specific sounds. For Creatures 2, a far more capable system was created, as outlined below. This information was gained by GreenReaper during a university project and should not be considered official - no details of the MNG format were ever released by Creature Labs, only a three-page article The Music of Creatures describing some features.
Editing and Playing Creatures Music
Two tools are desinged to handle MNG files, MNGPlayer and MNGPad - MNGPlayer lets you play music in the background (or foreground), while MNGPad allows you to edit existing MNG files and create your own. Both can be found at the MNGEdit project page. They require the Microsoft .NET Framework to be installed, available from Windows Update.
Hidden within the audio directory of Creatures 2, an amusing musical track entitled 'DJ_G' is to be found, consisting of a Grendel repeatedly hitting a Norn to the sound of a techno remix of some of the sounds from the game. Upon the release of Creatures 3 a similar track was found in there. These may have been made by Mark Ashton. See also Defiant Doosers.