The Core Rulebook will contain the options for creating and advancing your character, running a "season of episodes" as a Gatemaster for your friends, and new original content (planets, races, Goa’uld).
Standard Edition is a full-color, hard-bound book, which contains over 360 pages of core rules needed to create characters and everything you need to run a Stargate SG-1 campaign, plus a foreword by David Read.