
- BGG rank
- BGG #2,055
- BGG rating
- 7.3
Necromunda
- 2–4 players
- 30 min
- Complexity 3.1/5
- 1995

Rules assistance for Book of the Astronomican
Plain-language explanations of turns, card effects and disputed situations, with official source references and saved question history.

What would you like to know?
Answers come from the official rulebook, with the page to check.
Book of the Astronomican is an expansion for Warhammer 40,000: Rogue Trader released in 1988 for 2 players, 120 minutes per game, and ages 12 and up. It was designed by Rick Priestley, Alan Merrett, Jim Bambra, John Blanche, Mike Brunton, and Sean Masterson and its main mechanics are Variable Player Powers and Dice Rolling.
This 112-page book includes: 43-page 3-part campaign by Rick Priestley Whitescar Space Marines Army List Hylgar's Hellraisers Imperial Army Army List Valerius Borodin Rogue Trader Army List Claw Nebula Pirates Army List Luggub's Drop Legion Ork Army List Eldar Pirates Army List Some new Imperial Characters Expands: Warhammer 40,000: Rogue Trader
Book of the Astronomican 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 Book of the Astronomican 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 Book of the Astronomican for ages 12 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.
Book of the Astronomican has a complexity rating of 3.0 out of 5 from BoardGameGeek players, which makes it a medium-weight game. The rating reflects how much rules knowledge, planning and decision-making a typical game demands. Expect a longer first teach for heavier games, and use a preparation guide before game night.
Book of the Astronomican belongs to these categories: Fighting, Miniatures, and Science Fiction. Its main mechanics are Variable Player Powers and Dice Rolling. 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 Book of the Astronomican are: Rick Priestley, Alan Merrett, Jim Bambra, John Blanche, Mike Brunton, and Sean Masterson. 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 Book of the Astronomican as an expansion for Warhammer 40,000: Rogue Trader. 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: Rogue Trader to use it. Check that your edition of Warhammer 40,000: Rogue Trader is compatible, as some expansions were revised between editions.