From the corpse of an atmospheric monitoring station, a trove of data revealing anomalous patterns breaking with local climatic conditions - a signature of the ancient art of cloudseeding. For now, your discovery is secret. Across the broken land, clues to the source are scattered. If too much suspicion is raised, others will take up the hunt - water is life and water is wealth. Compelled, the rain will fall. What will it find upon the earth? Rainmaker is an Adventure Module by ENNIE Award winner Luke Gearing, designed for Salvage Union, a post-apocalyptic Mech tabletop RPG.