Some time after the launching of the main game, Blue Fang Games launched the first of three expansions: Endangered Species. The possibility to manage their own zoo appealed to thousands of users, it may have been due to the fact that they could choose their own distribution or that they had the chance to choose the animals, even endangered animal species in Endangered Species. Zoo Tycoon 2 is, without doubt, one of the most important business simulation games of the last few years.
