This is an unofficial expansion for the game Star Fleet Battles Captain's Edition. This is the description on the cover:Includes - the following rules: - Far Side phasers - boomerang torpedoes - fuser mechanisms - boomerang racks - Indirigan special rulesHistorical background for the Indirigans: - Indirigans history - Far Side political map - Indirigan Tribe profiles - 4 historical scenariosTechnical information including: - ship descriptions for 24 Indirigan units - a boomerang tracking chart - boomerang declaration cardsAlso included: 24 Companion SSDsExpands: Star Fleet Battles - Captain's Edition Basic Set - BoardGameGeek