(From the introduction) "The gamemaster has three tasks in STAR TREK: The Role Playing Game. He must design the encounters, present them to players, and judge the resulting action. This book contains information to help him with these tasks.
Included here is a chapter giving information for designing encounters. In this chapter are systems allowing the gamemaster to design encounters in "space...the final frontier." The gamemaster will be able to design "strange new worlds" for the players to explore and "new life and new civilizations" for them to seek out. Included is a section giving new gamemasters hints to help them with their own designs.
There is a chapter giving hints on presenting scenarios, on the art, if you will, of being a gamemaster. This includes how to create descriptions that will excite players and how to use all types of game aids, including maps.
In the chapters giving information on judging the action, the gamemaster will learn howto interpret a judge the rules. Some of this information twill be repeated form the layer book so that the gamemaster does not have to flip back and forth, but much of it will be new. In this section are given the tables and specific rules on how to judge tactical movement and combat, injury, and recovery, creation and use of attributes and skills, and use of equipment. The information in these chapters is presented in the same order as in the player book, for easy cross-reference."
- Star Fleet Officer's Manual
(Player summary) The SFOM provides the character creation process and details the tactical movement/combat system, including a 1-page weapons stats table.
- Cadet's Orientation Sourcebook
(Player summary) The COS provides a summary of details about the Star Trek universe including: a timeline, terms glossary, gazetteer on the major races, a map, equipment details, guidelines for encountering unknown vessels in space, stats for the Original Series characters, and a short story depicting the events that occur during the character generation process.