The Lost Temple of Gygaxathoth is a mission module for FIST, designed around a simple yet frightening premise: what if the weird stuff in a cosmic horror story was just Dungeons & Dragons?

The mission is centered around a recently unearthed temple to a long forgotten god, an eldritch location that shapes itself into a classic RPG dungeon as it adapts to the machinations of a cult of evil wizards that has taken residence inside.