Invaders from Below (4th Edition)

Subterra, a hidden kingdom that lies entirely beneath the earth. Included are maps and guidelines for running underground adventures. With eight complete scenarios Invader From Below contains details of the Subterrans themselves, including game statistics, lifestyle, ecology, and mannerisms. Lets not forget about the detailed background for King Earthwyrm and his twelve superpowered Darklings.... The invasion is about to begin....