
- BGG rank
- BGG #3,900
- BGG rating
- 7.0
Starship Samurai
- 2–4 players
- 60–90 min
- Complexity 2.5/5
- 2018

Rules assistance for Warhammer 40,000: Conquest – Decree of Ruin
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: Conquest – Decree of Ruin is an expansion for Warhammer 40,000: Conquest released in 2015 for 2 players, 45 minutes per game, and ages 14 and up. Its main mechanics are Hand Management, Set Collection, and Area Majority / Influence.
From the publisher's website: War spreads to the planet of Sacaellum with Decree of Ruin, the first War Pack in the Planetfall cycle for Warhammer 40,000: Conquest! A new phase of war has begun in the Traxis sector as each faction returns to the goals that drive it. As part of the Planetfall cycle, the new cards in this War Pack give new meaning to the type symbols on each planet. When you battle on a planet with symbols aligned with your goals, your units gain powerful benefits to help you achieve victory. Of course, this expansion also offers new cards to swell every faction’s armies, including the Tyranids faction introduced in The Great Devourer. In addition, you can inspire your troops in battle with a new Astra Militarum warlord or form unlikely alliances with a new Tau warlord. The war for the Traxis sector intensifies with Decree of Ruin!
Warhammer 40,000: Conquest – Decree of Ruin 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: Conquest – Decree of Ruin is 45 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: Conquest – Decree of Ruin for ages 14 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: Conquest – Decree of Ruin has a complexity rating of 3.3 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.
Warhammer 40,000: Conquest – Decree of Ruin belongs to these categories: Card Game, Fighting, and Science Fiction. Its main mechanics are Hand Management, Set Collection, and Area Majority / Influence. 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 catalogue lists Warhammer 40,000: Conquest – Decree of Ruin as an expansion for Warhammer 40,000: Conquest. 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: Conquest to use it. Check that your edition of Warhammer 40,000: Conquest is compatible, as some expansions were revised between editions.