Fast and Easy Money
Hold down the "Shift" button and press "4" to instantly win money at the beginning of your game. Add water anywhere you can in your zoo in either Challenge or Campaign mode and your cash value will be instantly raised. Make people repay the entrance fee multiple times by picking them up after they have paid and putting them outside the gate; they will pay to get back into the zoo. In Challenge mode, place the cursor the "Up" button hat, but don't click on it--push the "Up" arrow button on your keyboard to get more starting money. When you begin your zoo you will have many trees and bushes on your land; plow them down and get a big money boost.
Rare Animals
Put five Bengal Tigers into a single cage and one will turn white.
Faster Movement
Hold the "W" key and "Shift" and the "Up" arrow key and click the left mouse--you will move faster throughout your zoo to save time.
Fun Tips and Tricks
At the Challenge menu of the game, spin the globe really fast and you'll hear people screaming. If an animal is about to die quickly, put it in a crate and it might choose to live. Wall in multiple guests to trap them, build them bathrooms, food and drink stands, tables, benches and an ATM, raise the prices in this area and watch your captives quickly boost your economy. Place as many guests as you like in this section; as long as they're happy they'll keep spending money.