
- BGG rank
- BGG #6,165
- BGG rating
- 6.7
Warhammer Epic 40,000
- 2–4 players
- 180 min
- Complexity 3.2/5
- 1997

Expansion for Warhammer 40,000 (Third Edition)
Rules assistance for Warhammer 40,000 (Third Edition): Codex – Space Marines
Plain-language explanations of turns, card effects and disputed situations, with official source references and saved question history.

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Answers come from the official rulebook, with the page to check.
Warhammer 40,000 (Third Edition): Codex – Space Marines is an expansion for Warhammer 40,000 (Third Edition) released in 1998 for 2 players, 120 minutes per game, and ages 10 and up. It was designed by Jervis Johnson, Andy Chambers, and Gavin Thorpe and its main mechanics are Variable Player Powers, Dice Rolling, and Modular Board.
The Warhammer 40,000 Codex books contain the complete rules for playing various armies in Warhammer 40,000. They also contain in-depth painting guides, army lists, and much more. User summary: Codex: Space Marines is an expansion codex book for Warhammer 40,000 3rd Edition. This codex covers the most common Space Marine Chapters detailing history, equipment, organization, special rules and characters, painting schemes, and army lists. From the back cover: Space Marines are Humanity's ultimate warriors, dedicated to the defence of the Emperor and the Imperium of Man. Inside you will find: Army Lists: The complete Space Marine army list, which allows you to choose your forces for a battle. Also included is information detailing all the weapons, vehicles and wargear used by Space Marines. Hobby Section: Sixteen full colour pages packed with invaluable tips and advice on collecting, painting and playing with a Space Marine army. Special Characters: Complete rules and background information for Space Marines characters such as Marneus Calgar, the Emperor's Champion, Captain Cortez and others. New Scenario: Planetfall Mission - a new Space Marine mission scenario and rules for playing it. ISBN: 1-869893-28-X Re-print in 1999, 2001 and 2002.
Warhammer 40,000 (Third Edition): Codex – Space Marines supports 2 players according to the catalogue. This is the publisher’s listed player count, so the game is designed for exactly that number of participants. Variants for other group sizes, if any, are described in the rulebook of your edition, so check it before setting up a different configuration.
The listed playing time for Warhammer 40,000 (Third Edition): Codex – Space Marines is 120 minutes. This is the publisher’s estimate for a full game. The actual duration depends on the group, the player count and familiarity with the rules: first sessions usually run longer, while experienced groups often finish faster. Setup and teaching time are not included in this estimate.
The catalogue lists Warhammer 40,000 (Third Edition): Codex – Space Marines for ages 10 and up. This is the publisher’s recommendation and reflects reading demands, rule complexity and small components rather than theme alone. Younger players can often join with help from an adult, so check the age guidance on your edition and consider your group’s experience with board games.
Warhammer 40,000 (Third Edition): Codex – Space Marines belongs to these categories: Wargame, Miniatures, and Science Fiction. Its main mechanics are Variable Player Powers, Dice Rolling, and Modular Board. Categories describe the theme and setting of a game, while mechanics describe what players actually do on their turns. Each mechanic links to a catalogue hub with similar games, which helps when you want something comparable.
The credited designers of Warhammer 40,000 (Third Edition): Codex – Space Marines are: Jervis Johnson, Andy Chambers, and Gavin Thorpe. These credits come from the published game data and name the people responsible for the game’s design, not its illustrators or publishers. Designer pages on MeepleRules collect other titles by the same designers, which helps when you enjoy a game and want to find similar ones.
The catalogue lists Warhammer 40,000 (Third Edition): Codex – Space Marines as an expansion for Warhammer 40,000 (Third Edition). Expansions add new content, rules or scenarios to the base game and usually cannot be played on their own, so you need Warhammer 40,000 (Third Edition) to use it. Check that your edition of Warhammer 40,000 (Third Edition) is compatible, as some expansions were revised between editions.