Zoo Tycoon 2: Extinct Animals Unlockables
PC | Submitted by Extinct ExpertKiller Penguin
When Bringing a animal back to life (after you've built the fossil) Score less than 50% And you have a chance to get a killer penguin egg. However you can also get other animals.
2. Giant Bullfrog
3. Giant butterfly
5. Killer Penguin
The Killer Penguin is the only one of these animals that can be put in an exhibit. The rest will disappear.