The Foggy Island Horror

From publisher blurb: A GM adventure for Tunnels & Trolls On the island Dunmorrin, a few miles south from the shores of the Dragon continent, the strange sorcerer Belvidore delved into magicks best left untapped. To this very day, his experiments make the island a dangerous place, which is why it's the place to be. Come get your dose of cosmic terror and sword & sorcery in this scenario.