An insidiously addictive simulation game, Zoo Tycoon allows players to create their own zoo, but not just any zoo. It's completely free-form: Start with fences for your exhibits, then pick animals and ...

As the first expansion to Zoo Tycoon 2, Zoo Tycoon 2: Endangered Species adds 20 rare animals to the game, as well as new features such as vehicle tours, sky trams, and elevated walkways and ...