Here's something you don't see every day as Cauterize from EAB has come across an old 1990's pre-release demo of Lemmings; which was a puzzle-platformer video game originally published by Psygnosis for the Amiga in 1991. According to Cauterize it features a different title screen, varied music and a new level ordering. What was also interesting about this pre-release demo as mentioned by s2325, was a "lost" soundtrack. The music cannot be heard throughout the demo itself, but rather the mod files need to be extracted out of the disk. Also according to S2325, Mindless at lemmingsforums.net was the one to extract the data files. The tracks in this set are sorted in a random order, as there is no way to figure out on which levels the tracks were assigned. So here we have the full soundtrack, available to listen to on Youtube.
Hopefully a version of the pre-release demo is released into public hands at some point this year!
Update : More information can be found HERE