As the scene opens...hostile alien vessels converge on a starship in the distant reaches of space...scientists and doctors examine the dying victim of a mutant strain of bacteria...heavily armored space marines discover an ancient artifact on a desolate world... Imagine the future--one epic at a time! This roleplaying game provides a framework forall kinds of contemporary to far-future science fiction adventures. The Gamemaster Guide, the companion volume to the Alternity Player's Handbook, contains everything needed to moderate the Alternity game, including: Rules for creating memorable supporting characters, adventuress, and campaigns for any SF setting. A "Fast-Play" chapter that teaches the basics of moderating the game and provides a starting adventure. Starship construction rules and a tactical space combat system. Comprehensive star system design rules, including stellar classes and planetary environments. More than 30 aliens, creatures, and dangerous animals to use as opponents. Templates that quickly bring supporting characters to life. Guidelines for designing new alien species and alien artifacts. Adventure triggers to spur your imagination and ignite the action. A complete index for both the Player's Handbook and the Gamemaster Guide.