Ecosystem is a card-drafting game in which players choose cards and place them in their playing area turn by turn. The cards in a player's playing area form their own personal ecosystem, and at the end of the game a player will have twenty cards in their ecosystem, with the game containing eleven types of cards.

Bears score by being placed next to bees and trout; trout score by being placed next to streams and dragonflies; and at the end of the game the flows are compared with each other, with the player who has the largest flow earning points. These are just a few examples of how scoring works in Ecosystem. Don't forget to diversify!