Book I

Book I of the Codex Nova Terra is a fan publication that covers the period of the early Nova Terra Interregnum, covering the background of how and why Nova Terra seceded and the first few decades of the rebellion. It covers:

• The Lore – Expanding upon the existing lore, Book I provides an account from an Imperial scholar around the context of the early 35th millennium, the events that led to the Nova Terran secession, as well as information on wider secessions and rebellions such as the Moirean Heresy, the Carrion Empire, and the Tellarite Rebellion.
• Core Rules – Book I provides many of the core rules to play games using the modified 5th edition ruleset, as well as information on all the factions playable in the era.
• New Army Rules – The book also provides new units and characters to include in armies set during the 35th millennium.
• Campaign Missions – The book provides a number of missions for you to play to recreate the battles of the Nova Terra Interrengum.
• Campaign System – At the end of the book, a campaign system for playing through one of the many campaigns of the Nova Terra Interregnum can be found.

The version of the book provided is the 1.0 draft that was launched in June 2026. The first version is the simple PDF and second version underneath is a double page spread more like a traditional book.