Microsoft Game Studios has released a playable demo of Zoo Tycoon 2: Extinct Animals, giving you the chance to try out the latest expansion for Zoo Tycoon 2, now available in stores for the estimated retail price of $29.99. Developed by Blue Fang Games, Zoo Tycoon 2: Extinct Animals features new challenges, more than 30 new animals, new ways to play and a new look through extinct-themed objects and buildings.