The name of this map is derived from the fact that this map was originally designed for a 2003 contest at Doomworld run by Owen "Sarge Baldy" Lloyd, where participants would be assigned Slige levels, and then tasked with detailing them, keeping the original structures but making them look nothing like the originals. Cunnings was one of the participants who finished and submitted an entry. It had five successful entries, and a compilation wad was made. However, it was rejected for submission to the idgames archive for violating the Wad Rule banning the use of auto-generated Slige levels, regardless of the nature of the contest. Despite this decision, in 2007, the Tuning Contest WAD, the result of a similar contest involving a map created by Oblige, another random map generator (many entries of which also look nothing like the original,) was accepted into the archives. The Slige modification contest wad appears to no longer have any copies available online.
As Community Chest 2 was nearing completion, there were a few empty slots remaining, including MAP03 and MAP20. Cunnings would fill these slots with his SLIGE modification contest entry, and the previously unreleased Enigma, respectively.