Men of the Sea explores the seas, coasts, and islands of Glorantha through the eyes of sailor heroes. It introduces eight new homelands for heroes, describes the many different ways that sailors worship Dormal the Opener, explores life as a sailor, and provides full rules for applying the HeroQuest rules to sea-borne contests.

Men of the Sea teaches players how to navigate their heroes across the wonderful, dangerous waters of Glorantha–brave or foolhardy, these sailors ply the seas in search of fame, fortune, and knowledge.