This is an unofficial expansion for the game Star Fleet Battles Captain's Edition. This is from the description on the back cover and contents: Includes all the rules needed to for play: - Two new star-faring races - Bolaar Phaser Capacitors - Deflection/Transfer Device - Option Mounts - Krebiz Capitalist Alliance - Variable Plasmas Historical backgrounds of two new races: - Bolaar Pirates - Corporate Aggressors - Tuforeous Dead Zone Technical information including: - A fleet data table listing all the new races ships - all necessary annexes Also included: 22 Companion SSDs Expands: Star Fleet Battles: Captain's Edition Basic Set