The heroes journey deeper into the Vast to the Gate of Twelve Suns, an alien megastructure incorporating no fewer than a dozen stars. They must explore the vast construction to learn how to open a portal to the demiplane that contains the alien superweapon they have been seeking, but the heroes must contend with the Cult of the Devourer for control of the alien technology. Only by finally defeating the cult can the heroes keep the superweapon out of the wrong hands—though the cult is far from the only threat facing the heroes.
The Thirteenth Gate is a Starfinder Roleplaying Game adventure for four 9th-level characters. The adventure continues the Dead Suns Adventure Path, a campaign in which players explore the secrets of the galaxy as members of the Starfinder Society. It also includes a detailed look at several new planets and their inhabitants, culture, and technology; a collection of technological relics from a long-vanished alien civilization, and a selection of new monsters from alien worlds.
Each bimonthly full-color softcover Starfinder Adventure Path volume contains a new installment of a series of interconnected science-fantasy quests that together create a fully developed plot of sweeping scale and epic challenges. Each 64-page volume of the Starfinder Adventure Path also contains in-depth articles that detail and expand the Starfinder campaign setting and provide new rules, a host of exciting new monsters and alien races, a new planet to explore and starship to pilot, and more!