|Queen of the Demonweb Pits|
The series of modules that introduced the Drow (or dark elves if your not familiar) to D&D. This was long before R.A. Salvator made them popular with Drizzt Do'Urden and the Icewind dale series of books. It also introduced the spider goddess Loth the final boss of the module. This was one of the most classic of the early D&D modules so much of D&D that came after started in this series with G1,2,3 known as the against the giants modules then followed by D1,2,3 known as the drow modules. I was really pleased that they threw in that little piece of real D&D history as an easter egg.