In The Emperor’s Name (also known as ITEN) is a set of rules for skirmish games set in the Warhammer 40,000 universe created by Games Workshop. ITEN allows you to create narrative games inspired by the adventures of characters such as Gregor Eisenhorn, Gideon Ravenor or Shira Calpurnia, or any of the millions of Inquistors, Arbitrators, Roque Traders, Explorators and other personalities of the Imperium — as well as their enemies, be they Xenos or Chaos.

In The Emperor’s Name was created by Craig Cartmell and the other members of the Forge Of War Development Group.

ᵻ Core Rules (PDF, view online)
These are the core rules of the game.

ᵻ Campaign System (PDF, view online)
Details of the campaign system used to play games.

ᵻ Retinues (PDF, view online)
Retinue Lists for many of the factions in the Imperium, including:

The Forces Of the Imperium:

• Adeptus Astartes
• Adeptus Arbites
• The Ecclesiarchy
• The Imperial Guard
• The Holy Ordos of the Inquisition
• Imperial Navy
• Rogue Traders
• Adeptus Mechanicus
• Hive Gangs

The Forces of Chaos:

• The Traitor Legions
• The Blood Pact Death Brigade
• The Lost and the Damned

Xenos Forces:

• Bloodaxe Warbands
• Genestealer Cults
• Tau Incursion Teams
• Squat Brotherhoods
• Ancient Slann Warbands
• Eldar Pirates
• Craftworld Eldar
• Eldar Harlequins
• Necrons