The module contains two different games. Dungeon Master is originally "Venture" by Coleco. Creature Strike is originally "Demon Attack" by Imagic.
Company Information
Neckermann was another mail order company like Quelle or Otto Versand in Germany founded by Josef Neckermann in 1948. They advertised their HES (Home Entertainment Suppliers) games in the early ninties in a huge catalog with the possibility of ordering them with postcard or telephone.