A One-Round Living Greyhawk Gran March Regional Interactive
From the introduction:
Long ago, a brilliant gnomish inventor's dreams came crashing down when one of his inventions was used in an attack on Fort Tribulation. Can his reputation be salvaged, or are his dreams destined to become nightmares?
A Gran March Dungeon Crawl Interactive, APLs 2-10.
Note: This adventure is not suitable for centaur PCs.