C1: The Hidden Shrine of Tamoachan

From Front Cover:

This module was originally used for the Official ADVANCED DUNGEONS & DRAGONS tournament of Origins '79, and is the first in another new series of modules from TSR, the COMPETITION SERIES. This module contains a challenging setting as well as an original scoring system and an assortment of pre-rolled characters for adventuring. The module may thus be used for private competition among players, or as a separate, non-scored adventure! Also included therein are background information, a large-scale referee's map, referee's notes, and new monsters and descriptions for an added taste of excitement.

This module is meant to stand on its own, and includes areas on the map where Dungeon Masters may add their own levels.

Pictures: