Codex: Eye of Terror covers the 13th Black Crusade and the forces that fought in it. It adds four army list supplements, each usable alongside its parent codex:
- Space Wolves 13th Company — Troops choices for a Space Wolves army fighting alongside the lost 13th Great Company, usable with Codex: Space Wolves.
- Cadian Shock Troops — Special rules, Kasrkin, Youth Army cadets, and the special characters Lord Castellan Ursarkar E. Creed and Colour Sergeant Jarran Kell, usable with Codex: Imperial Guard.
- The Lost and the Damned — A complete Chaos Horde army list built from mutants, traitors and daemon-summoning cultists, drawing on Codex: Chaos Space Marines and Codex: Imperial Guard.
- Ulthwé Strike Force — Webway Strike deployment and the Spear of Khaine/Seer Council HQ choices, usable with Codex: Eldar and Codex: Craftworld Eldar.
- Space Wolves 13th Company (4 pages)
- Cadian Shock Troops (3 pages)
- The Lost and the Damned (6 pages)
- Ulthwé Strike Force (2 pages)