How do you get all the animals for zoo tycoon 2 extinct animals demo?

In Zoo Tycoon 2: Extinct Animals, players can unlock various extinct animals by completing specific tasks and challenges in the game. To acquire these animals, you typically need to complete certain scenariOS or missions that may involve achieving high ratings or completing particular objectives. Additionally, some extinct species can be unlocked through the game's campaign mode or by using cheats. Be sure to explore all the available scenariOS and fulfill the necessary requirements to expand your collection of extinct animals!