Adventureland: Enigma Variations - Short company information and a detailed list of the adventures they have published. www.if-legends.org/~adventure/Enigma_Variations.html
GameStage: Enigma Variations - Detailed description of the company, as well as their released titles, including the game's genre, year of release, developer(s) and publisher(s). gamestage.topcities.com/zx-enigmavariations.html
YSRnRY: Enigma Variations - Softography and reviews of some of their games. www.ysrnry.co.uk/bycompany/Enigma_Variations.htm
