1990 · ソースブック（プレイを拡張するルール／オプション）

Era Ten Sci-Fi Role-Play

In a distant future, the Tetra-League joins humans and three alien races in an alliance threatened by internal rivalry and external forces. A mutated Pacification Virus has made nearly all citizens unable to commit acts of aggression, while rare unaffected individuals known as Immunes serve as soldiers, investigators, or agents. This science-fiction role-playing game provides rules for character creation, skills, advancement, equipment, psionics, powered armor, starships, ship-to-ship combat, and mass battles. Three booklets cover the core system, scenario design, encounters, interstellar travel, and campaign background, with adventure seeds, locations, worksheets, and a referee screen included. Play requires two eight-sided dice and a standard deck of playing cards.