A nascent cosmic entity stirs deep within one of the Pact Worlds planets. To aid the god's birth, its most devoted followers search the Ghost Levels of Absalom Station for a sufficient power source—a strange pocket dimension existing alongside the hub of the Pact Worlds. As the entity's emergence sends ripples across space time, a group of heroes becomes trapped in the Ghost Levels! With dangerous creatures and ominous power surges threatening the station, the heroes must team up with the residents of Little Akiton to investigate these horrifying new foes, stop their meddling—and stay alive!A Cosmic Birthday is a complete Starfinder Second Edition Playtest adventure for 1st-level characters written by Jenny Jarzabski, and features fan-favorite Starfinder creatures updated to Second Edition, all-new cosmic horrors, and a mix of classic dungeon crawling and narrative-rich sandbox adventures. This adventure is designed to introduce the Starfinder Second Edition Playtest rules, giving players like you a chance to shape the new edition through feedback surveys about your playtest experience! It also takes place during a pivotal moment in Starfinder history—even if you miss the playtest window, you won't want to miss the adventure!