This game has 32 cards, each one representing a wild animal, with its name, a photograph, its habitat on a world map, and its value in 5 attributes: Size, Max Speed, Weight, Lifespan, and Danger Lever (the latter from 1 to 10). There is also a card that just says "Flax". And, two rules cards, and a title card that advertises the other versions: Flax Dinosaurs, and Flax Creatures of the Sea.
The Flax basic game is War-like. All the cards are dealt out, and everyone looks at their top card. The leading player picks one attribute and reads it out loud ("Okapi, Max Speed 35 mph".) Everyone lays their card down and the card with the highest value in that attribute takes the lot; they go to the bottom of the winner's pile and he leads to the next trick. The "Flax" card wins any trick but only may be used once. The ultimate winner is the one who gets all the cards.
In the advanced game, players may look at their whole hand. The leader chooses a card and a category, and only players who can beat it play to the middle. The one who takes the trick leads next; but the game is won by the player who gets rid of all their cards first.