Content

Typically very large, offering between 20 and 30 animals, at least one new building/scenery theme with some general additions on the side, a healthy amount of new foliage, a few new maps, new challenges, between 1 and 3 new campaigns and - in the real crème de la crèmes - novel, game-changing gameplay mechanics.

Four expansions were released under Blue Fang - Endangered Species spotlighted threatened animals and conservation success stories and introduced tour vehicles and elevated paths to the game, African Adventure offered a slew of charismatic African wildlife and improved animal behavior but was generally extremely bare-bones (no new foliage, a single three-scenario campaign, no new additions to gameplay...), Marine Mania was all about the ocean and went all-out with expanding the game to accompany its creatures (brand new biomes, tanks, marine foliage, Seaworld-style shows, player diving mechanics, etc.) and Extinct Animals brought aggressively-stylized extinct wildlife and three new minigames to the table.

The smallest possible package for a download - at largest, the original bonus downloads comprised of one animal and a theme pack or a decently fledged beautification pack, and they got as small as one animal with nothing accompanying it and a pack including four guest variants and a drinking fountain.

A total of nine official bonus downloads were released (discounting the Asiatic black bear), from the Black Leopard & Stuffed Prey Dummy in November 2004 to the Holiday Pack in December 2005, to the website-exclusive Addax at some point in mid/late 2006 that was intended to complement African Adventure.