
- BGG rank
- BGG #3,595
- BGG rating
- 6.5
Best Treehouse Ever
- 2–4 players
- 20 min
- Complexity 1.4/5
- 2015

Rules assistance for Cosmic Colonies: Monumental Achievement 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.
Cosmic Colonies: Monumental Achievement Expansion is an expansion for Cosmic Colonies released in 2020 for 1–5 players, 30–45 minutes per game, and ages 13 and up. It was designed by Scott Almes and its main mechanics are Tile Placement, Simultaneous Action Selection, and Pattern Building.
This mini-expansion contains 9 monumental tiles, 5 new basic workers and 5 new advanced workers. It's the original extra content that was created during the KS-campaign (and given for free to KS-backers) and will be available afterwards. You add as much monuments as there are players at the start of the game. If you can create the exact shape of a monument with free squares on your board, you can claim the corresponding monument tile, which will be worth 5 VP at the end of the game.
Cosmic Colonies: Monumental Achievement Expansion supports 1–5 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 Cosmic Colonies: Monumental Achievement Expansion is 30–45 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 Cosmic Colonies: Monumental Achievement Expansion for ages 13 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.
Cosmic Colonies: Monumental Achievement Expansion belongs to these categories: Science Fiction, Expansion for Base-game, and Space Exploration. Its main mechanics are Tile Placement, Simultaneous Action Selection, and Pattern Building. 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 Cosmic Colonies: Monumental Achievement Expansion are: Scott Almes. 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 Cosmic Colonies: Monumental Achievement Expansion as an expansion for Cosmic Colonies. Expansions add new content, rules or scenarios to the base game and usually cannot be played on their own, so you need Cosmic Colonies to use it. Check that your edition of Cosmic Colonies is compatible, as some expansions were revised between editions.