"Warhammer 40k: Index: Xenos 1" is one of the core rulebooks released at the beginning of the eighth edition of the Warhammer 40,000 game. This index was designed to consolidate and update rules and unit profiles (datasheets) for the main alien (Xenos) factions. The "Xenos 1" volume covers armies such as Aeldari (Craftworlds, Dark Eldar), Orks, and Tyranids. It was an essential resource for players wishing to use their Xenos armies in the new rules system until individual Codexes were released.
