Zoo tycoon 2

Zoo Tycoon 2, (known colloquialy as ZT2) is a simulation computer game in which the player must successfully create and run a zoo, by managing its finances, employees and animal exhibits. The goal is to become a "zoo tycoon".

care for animals build exhibits anything that involves zoo up to 110 animals original once extinct animal EX comes tons more user made downloads.....almost any animal that u see in zoos today u can play with in ZT2
download the demo here
http://www.microsoft.com/games/zootycoon/zoo2/downloads.asp

(on a side note i makeing animals for the game tooo:))