
- BGG rank
- BGG #4,569
- BGG rating
- 6.8
Bios: Megafauna
- 1–4 players
- 60–120 min
- Complexity 3.7/5
- 2011

Rules assistance for American Megafauna (Second Edition): Expansion Set
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.
American Megafauna (Second Edition): Expansion Set is an expansion for American Megafauna released in 2006 for 1–5 players and ages 9 and up. It was designed by Phil Eklund and its main mechanics are Variable Player Powers and Auction / Bidding.
From the publisher's website: This expansion set for the American Megafauna evolutionary game adds new technology, venom, and marine adaptations. It also expands the game into a five-player game, with the addition of the Proto-Croc player, aka “Arizonasaurus”. This is an expansion set, you will need American Megafauna to play, preferably the second edition. Expansion set contents: A booklet that includes errata, alternate starting biomes, and a personal commentary on the significance of the game to today’s events, A new creature sheet, along with a card and tents for the new fifth player, New cards: 31 new DNA cards, 9 new biome cards, 4 new catastrophe cards, and 2 new genotype cards. Expands: American Megafauna
American Megafauna (Second Edition): Expansion Set 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 catalogue lists American Megafauna (Second Edition): Expansion Set for ages 9 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.
American Megafauna (Second Edition): Expansion Set has a complexity rating of 3.4 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.
American Megafauna (Second Edition): Expansion Set belongs to these categories: Animals, Educational, and Prehistoric. Its main mechanics are Variable Player Powers and Auction / Bidding. 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 American Megafauna (Second Edition): Expansion Set are: Phil Eklund. 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 American Megafauna (Second Edition): Expansion Set as an expansion for American Megafauna. Expansions add new content, rules or scenarios to the base game and usually cannot be played on their own, so you need American Megafauna to use it. Check that your edition of American Megafauna is compatible, as some expansions were revised between editions.