An ecosystem combines living organisms and the environment, which exist in close connection with each other. A change in any element affects the entire ecosystem, but due to its stability, equilibrium is quickly restored. Sometimes, a random event leads to the butterfly effect, an unpredictable cascade of changes that can completely transform the biosphere. Butterfly Effect is an add-on expansion to the game Evolution: New World. The new animal traits allow you to fine-tune the game ecosystem, create new survival strategies, and maybe even win the Alien World scenario.