Unlockable Items
To unlock the flower arch, complete all scenarios in the Troubled Zoos Campaign. To unlock the flower post, complete all scenarios in the Zookeeper Training campaign. To unlock the gilded panda statue, complete all scenarios in the Mysterious Panda campaign. To unlock the globe statue, complete all scenarios in the Globe Campaign. To unlock the Sundial Statue, complete all scenarios in the Prevent Animal Abuse Campaign.
Unlockable Themes
To unlock the African theme, five game challenges must be completed. To unlock the Jungle Theme, five photo challenges must be completed.
Run Faster
Left-clicking the mouse, pressing the up arrow or the "W" key allows you to walk in zoo guest and photo safari mode, according to GameFaqs.com. You can walk twice as fast by holding two of these buttons at the same time. This also works in Zoo Keeper mode.
Bonus Items
To unlock the two-seat sky tram park, 100 guests must take a tour of your zoo. To unlock the four-seat sky tram park, 500 guests must take a tour of your zoo. Breeding 10 different endangered or critically endangered species unlocks the animal babies statue. To unlock the cat climber, complete the photo safari campaigns. Completing the endangered species campaigns unlocks the conservation breeding center and completing the Transportation campaigns unlocks the decorated jeep vehicle tour gate. Upgraded sky tram carts are unlocked by 1,000 total guests touring your zoo. The Sky Tower is unlocked by creating a 5-star jeep vehicle tour and a 5-star sky tram tour. To unlock the Jeep Commanders, you must receive $250,000 in donations. Completing two endangered species challenges unlocks endangered species themed buildings and objects. Adopting 20 different endangered or critically endangered species unlocks decorative zoo wall columns. Decorative zoo wall caps are unlocked by releasing 10 different endangered or critically endangered species into the wild.