Extra Money Cheat
Press "Shift" and "4" at the same time and you will earn extra money. There is no limit to this cheat. Use this cheat before laying down any fences, as the code partially deteriorates the condition of any existing fences.
Exhibit Name Cheats
Go to the "Exhibit Name" form to unlock certain animals. Name the exhibit "Xanadu" to unlock a unicorn. "Cretaceous Corral" unlocks the triceratops, and "Super Croc" unlocks the dienosuchus. Other names have varied effects on the zoo. To attract more guests, name an exhibit "Wonderland." Enter "Coprolite Corner" to make dino droppings appear as rocks.
Guest Name Cheats
Name a zoo guest "dinoman" to unlock every dinosaur species. Pair this cheat with the "Charlie Peterson" guest name cheat to get all of the foliage options. All of them will appear in your inventory. To speed up the egg hatching process, name a guest "eggman."
Employee Name Cheats
Zoo employees include scientists and maintenance workers. Your scientist will walk faster when you name one "Dr. Scholl." Naming a maintenance worker "The Rock" will cause every building in the zoo to blow up. To repair all your fences at once, rename a maintenance man "Bob V." Name a worker "George W." to get a $300 tax rebate on all your plants.