A One-Round Living Greyhawk Bandit Kingdoms Regional Adventure
From the introduction:
Torrock, a powerful ogre leader, is uniting the tribes of Bluff Hills orcs, ogres, and hill giants into a single powerful fighting force. No one in the region is safe. Now that you've "volunteered" to help, maybe you can track down Torrock's Lair.
An adventure for characters level 1 - 6.
Part one of the Bluff Hill's Silver series.