
- BGG rank
- BGG #5,341
- BGG rating
- 6.9
Cthulhu Wars: Duel
- 2 players
- 20–30 min
- Complexity 2.9/5
- 2020

Rules assistance for Cthulhu Wars: Yuggoth Map Expansion
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.
Cthulhu Wars: Yuggoth Map Expansion is an expansion for Cthulhu Wars released in 2015 for 2–4 players, 90 minutes per game, and ages 12 and up. It was designed by Sandy Petersen and its main mechanics are Variable Player Powers, Area Movement, and Dice Rolling.
The Yuggoth map is quite unusual. It adds three new Areas with special powers. The Slime Sea The faction which controls the Slime Sea overlook is allowed to summon the useful Slime Mold monsters, which are a good mid-level monster. The problem is that they obey anyone who controls the overlook. So if you have summoned up a batch of Slime Molds, and then another person captures the overlook from you, they take control! The Laboratory The faction which controls the Laboratory is able to use it to transform his Cultists into Brain Cylinders. Fans who have read The Whisperer in Darkness or seen the eponymous film know what I'm talking about. The cylinders still produce Power like a normal Cultist, but cannot move on their own (they have to be carried). They also cannot fight or be selected to take a hit in combat. Instead, when a Brain Cylinder is "dropped", the other side can capture it. Now they get the Power from it. The Green Pyramid The Green Pyramid contains the mighty Brain of Yuggoth, which boosts your faction in many useful ways. However, each Cleanup Phase, the Green Pyramid's controller has to check to see if the Watcher of the Green Pyramid has been awakened! The Watcher is a particularly loathsome Great Old One [later reclassified as a Terror] who is the enemy of every faction, and which, after destroying all units at the Green Pyramid, moves on a set path around the map wreaking destruction everywhere. It has its own unique figure.
Cthulhu Wars: Yuggoth Map Expansion supports 2–4 players according to the catalogue. This range comes from the publisher’s listed player count, so the game can be set up for any group size within it. Some setups, rules and scoring details may still vary by player count, so check your edition’s rulebook for the exact configuration.
The listed playing time for Cthulhu Wars: Yuggoth Map Expansion is 90 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 Cthulhu Wars: Yuggoth Map Expansion 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.
Cthulhu Wars: Yuggoth Map Expansion has a complexity rating of 4.0 out of 5 from BoardGameGeek players, which makes it a heavy 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.
Cthulhu Wars: Yuggoth Map Expansion belongs to these categories: Horror, Miniatures, and Expansion for Base-game. Its main mechanics are Variable Player Powers, Area Movement, 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 Cthulhu Wars: Yuggoth Map Expansion are: Sandy Petersen. 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 Cthulhu Wars: Yuggoth Map Expansion as an expansion for Cthulhu Wars. Expansions add new content, rules or scenarios to the base game and usually cannot be played on their own, so you need Cthulhu Wars to use it. Check that your edition of Cthulhu Wars is compatible, as some expansions were revised between editions.