American Megafauna
Errata for the First Edition
Fri Jan 11 19:54:20 UTC 2008

Latest official errata (PDF) from Sierra Madre Games

Main Rules:

All errata come from designer Phil Eklund except those noted as "House Rules".

3.1 (addition) In a two player game, rm and mmrrr should not play against each other, as mmrrr would have too great an advantage. (house rule) In a two player game, rm and mmm should not play against each other, as rm would have too great an advantage.

5.1.4 final bullet (addition): Exception: Orogeny and Rain-shadow [5.1.6] biomes are always placed at biomass 2.

5.1.5 (replace first sentence) Displacement of Biomes: If a biome replaces a lower-climax biome in a slot, the original biome is displaced to an adjacent hex which has an empty slot available.

5.2.3 fifth bullet (addition): But if the holder of a special ability card should be exterminated and the card is transferred to another ecotype, that ecotype (and that ecotype only) may use the card.

5.2.6 (clarification): W DNA can only be chosen as single letter DNA, i.e. Wings is not a permitted choice. However, once played, it is legal to recess the W, and re-express as some other counter.

5.5.3 (addition): Genotypes with more than one M DNA (marine) which find themselves on a land biome must migrate directly into a marine biome or are removed from the map.

5.6.2 (addition): Predators need at least one M DNA to use a marine biome.

6.2.4 (addition) If more than one player is affected by the Pandemic, resolve in normal movement order, i.e. from more r dentition to least r dentition.

6.3.6 (addition) Only 1 biome in each holding zone is available for use. The first counter reaching the holding zone gets to decide which one. Immigrants who follow their biome into a holding zone decide ahead of players. Should more than one Immigrant follow a biome into a holding zone, choose the Immigrant who came from further west if Greenhouse went up, from further east if Greenhouse went down.

6.5.2 (Change last two sentences to read): Each immigrant has one "wild" (W) DNA that will transform into the most suitable DNA (except H) for the requirements (or niche) of that spot per 5.2.6. A DNA counter may be placed on its card to indicate this choice. If the "W" is not needed, it is dropped and cannot be used later.

6.5.2 (house rule clarification): When determining suitability for predator immigrants, it is sufficient that there be at least one prey counter in the biome which is of the right size and, after employing its "W" DNA, is edible by the predator. It is not necessary that the predator be certain of out-competing player counters at the location.

6.5.2 (house rule clarification): When using the optional rules 6.3.5 Holding Zones and 6.3.6 Exploitation of Biomes in Holding Zones along with Immigrants, the Immigrants do check the holding zones as possible initial suitable homes.

6.5.4 (Change sentence to read): Upon entry and during each population expansion period, immigrant cards are always considered to be a biomass equal to the maximum level allowed by the rules. Herbivore immigrants may be preyed upon by carnivores.

6.7.1 OMNIVORES In a four player game it is recommended that only the mmm player be given the benefit of this Omnivore rule, otherwise play balance is against the mmm player. This ability is not transferrable if the mmm player re-enters the game as an immigrant.

6.7.1 (House Rule) Omnivores who exist at both trophic levels are not allowed to participate in Carnivore Final Size Adjust (5.6.4).

6.8.2 END OF THE GAME (Change first sentence): This occurs at the end of the turn after one of the following happens:

6.9 EXAMPLE OF PLAY (Change sentence on Milankovich cycles): Note that the rainforest in Laurentia is lower climax than the ginkgoes next to it, and the culling rule (6.1.7) will keep the rainforest at biomass two even with its wet preference.


Note: the experimental rules from the designer are not supported by Rick Heli, the presenter of this website. While they may help the game to be a better simulation, in the 4-player game they probably also make even worse the already challenging prospects of the rrrr player.

Card #5: "querus" is a typo for "quercus"
Card #32: Change requirements from MA to M, "armored squid" should read simply "squid".
Card #65: (experimental rule from the designer) DNAHead A saber tooth 2-3 (Change to AA)
Card #67: (experimental rule from the designer) DNAHead AB beak 1-4 (Change to AA)
Card #99: Thumb Spike: This BIa genotype changes to Ba above size 2.
Card #111: Anapsid Turtles: This IMaa genotype changes to Maa above size 3.
Card #111: (experimental rule from the designer) Chelonia Turtle 1-4 IMaa (Change to AIMaa)
Card #114: (experimental rule from the designer) Pliosaur 1-4 AMN (Change to AAMN)
Card #116: (experimental rule from the designer) Phytosaur 1-3 Ma (Change to AMa)
Card #118: (experimental rule from the designer) Crocodile Eusuchian 1-4AM (Change to AAM)
Card #129: "pacycephalosaurs" is a typo for "pachycephalosaurs"
Card #131: Xenartha/Armadillo/glyptodont: This Iaa genotype changes to Gaa above size 3.
Card #188: (House rule) Rain Shadow Sand Dunes: Climax should be 89 rather than 79.
Sex DNA: (House rule) in two-player games this card adds +1 to the number of genes received instead of doubling.

Introductory Game

On the Introductory Games Sheet, and on the Solitaire Game Sheet, references to "yellow" cards should be to "green" cards. Also, "pink" cards should read "red' cards.

Introductory Game C4: Second sentence should end: "left to right (west to east)."

Strategy Notes

(revised) Don't Get Greedy (or, the "Bolide Bash").

An over-specialized creature is one which is so loaded with DNA that you can barely read the card. Such a creature has a lot of ability to survive, but in the Advanced game the penalty for such super-specialization is the ultimate one - outright termination! - if the proper Catastrophe should drop in. During the Mesozoic Era, there is a 23% chance that any creature with heritage and purchased DNA of more than 3 of any of A, a, B, G, M, or S and/or triple S dies from "comet smite"! During the Cenozoic, an asteroid kills anything with more than 2 of A, a, M or S and/or triple B (the "Roadrunner Crusher"). Another Cenozoic catastrophe (supernova) kills those having more than 4 of A, a, H, I, M and S and/or having triple I. Yet another (solar flare) kills anything bigger than size 4 or triple A or triple a. The following genotypes are at risk from these events: carnosaurs, deinonychosaurs, ostrich dinosaurs, horned dinosaurs, pangolins, ratites, and seabirds. You may choose to live dangerously and hope that these catastrophes don't appear in your game, but we recommend waiting until the Cenozoic when the chances decrease (to a 17% risk).

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