EXPANSION BOOK: The Gamemaster's Guide is an Expansion and requires Star Trek Adventures core rulebook to use. GUIDANCE: Story structure advice on developingstories. Insights on effectively using the game mechanics. Essential elements of Star Trek, setting details, and technology. NEW OPTIONS: Rules and gamemaster tools, including consequences, traits, variants, and advanced combat rules. SIX STAR TREK ERAS: Take part in stories anywhere in the Star Trek timeline. NINE PLAY STYLES: Deep space exploration to close to home, and beyond., Platforms: Windows XP