Unleash your imagination, creating new galaxies and tales with the Starfinder GM Core for Starfinder Second Edition! This comprehensive 264-page rulebook gives Game Masters everything they need to craft thrilling tales of adventure, from a single-night’s scenario on the mean streets to complex epics spanning years. Within these pages you’ll find clear guidelines for creating new hazards and alien creatures, tools to design challenging, balanced encounters, and rules for rewarding characters for the dastardly challenges you array before them! Starfinder GM Core also contains rules for quick-to-run cinematic starship combat and dynamic hacking rules! Starfinder GM Core is the second core rulebook for the Starfinder Second Edition RPG! Along with the Player Core and Alien Core, these books provide a new foundation for the future of tabletop gaming! Starfinder GM Core includes: The rules needed to run a game of Starfinder, including guidelines for creating challenging encounters, determining success, and giving out rewards. Advice aimed at making you an incredible Game Master, along with tools to ensure you and everyone else at your table has a safe and enjoyable experience. Guidelines to help you create your own content, from campaigns and adventures to hazards and monsters. Rules subsystems to help you handle a wide array of game situations, including rules for chases, cinematic starship combat, research, hacking infiltration, and more! A guide to the Pact Worlds and wider galaxy, with a look at several important regions, and an exploration of the wider cosmos!