From the introduction:
This 1st edition AD&D module is meant to inhabit that rare space where character sheets with years of wear are pulled out for a foray into legendary peril. Clearly, I have no interest reaching a broad audience. This thing you are holding was created for my own amusement and I offer it humbly to those grognards who refuse to die and further refuse to play anything else.
For it is you who understand that mechanics are the building blocks of real stories in the same way that the laws of physics and the universe at large create the mysterious and surprising stories of our lives. When dice are rolled in the open against hard rules, drama mounts and memorable moments are created.
While I don’t expect this brief introduction to win converts to the only rule system you need, it is my right to vandalize the introduction with a rant.