Special animals You can have animals such as the Asian Black Bear, Przwlaski's Wild Horse, Albino Gorilla, Chinese Alligator, etc available. Simply research the strongest fence and go to the bottom of the list of animals. All the ones after the Chinese Alligator are the ones that can be made available in the
scenarios. The Rainforest Zoo has the Przwlaski's Wild Horse and Asian Black Bear. Also the Condition Critical has the Albino Gorilla and Asian Black Bear.
Special terrain maps You can also have special terrain maps available by finishing scenarios. For example, Rainforest Zoo will make the Rainforest zoo terrain available.