The Ruined Clouds is a Starfinder Roleplaying Game adventure for 7th-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 gazetteer of the ruined alien city of Istamak, an exploration of the hyperspace plane called the Drift and the mysterious city at the center of it, and a selection of new monsters from alien worlds.