One of the bonus downloadable animals Blue Fang developed and released for Zoo Tycoon was the mythical Yeti, although there is evidence that it was originally planned to be an unlockable Easter egg animal in the base game, similar to the Unicorn and Triceratops. An unused cheat code exists where the Yeti would have been unlocked by naming an exhibit "Kathmandu", the name of the most populous city in the landlocked South Asian country of Nepal located in the Himalayas, where the Yeti was purported to have inhabited in legend.