The Challenge of Champions adventures by Johnathan M. Richards formed a series that was quite different from the normal scenarios that appeared in Dungeon magazine.
The adventures represented an annual adventurers' guild competition, with the PCs' party being one of a number of teams aiming to win. Each adventure consisted of a number of separate rooms, each with a puzzle, obstacle or task to complete, often with set equipment to help them. There were strict rules about other equipment and magic that could be used.
The first three adventures (in Dungeon issues #58, #69 & #80) were written for AD&D 2nd Edition, the fourth (#91) was for D&D 3rd Edition, and the fifth (#108) and sixth (#138) for D&D v.3.5.