Codex (Warhammer 40,000)

The third edition rendered these obsolete, and a new series began, including introducing codices for battle zones and campaigns.

Games Workshop no longer produce campaign or battle zone codices, instead releasing 'expansions'.

At the launch of 8th edition all previous codices were replaced with index books due to a major rules overhaul (as of November 2019 these indices are no longer produced).

The most common elements between iterations include: Codex supplements provide additional rules for sub-factions of a parent army.

For main article see Imperial Armour Imperial Armour is a series of official rules supplements to Warhammer 40,000 Codices produced by Forge World, a subsidiary company of Games Workshop.

Current, valid books: All codices were rendered obsolete by 10th edition Warhammer 40,000.

Battlezone codices were rules supplements that dealt with a specialised combat environment, instead of an army.

However, material in Codex: Catachans provides rules for jungle warfare.

The concept of a battlezone codex was replaced by Games Workshop's Expansions.