The gameplay revolves around creating suitable exhibits for animals through habitat modifications (ground cover, water, elevation, foliage and rocks and a variety of items including food, enrichment and shelter) which fulfill the animal's needs (habitat, hunger, thirst, stimulation, privacy, sleep, social, exercise). Similar to its predecessor, Zoo Tycoon, the objective is to build and operate a zoo by creating exhibits and aquariums, keeping guests and animals happy, and maintaining employees, finances, terrain, foliage and scenery. A Nintendo DS version, titled Zoo Tycoon 2 DS, was released in 2008. Originally released for Microsoft Windows, Zoo Tycoon 2 is also available for Windows Mobile, PDA, and Mac OS X, although expansions are not included in the Mac version. Zoo Tycoon 2 is a business simulation video game developed by Blue Fang Games and published by Microsoft Game Studios and MacSoft.