Zoo Tycoon is a business simulation developed by Blue Fang Games and released by Microsoft. Although first released for Microsoft Windows and Macintosh in 2001, it was ported to the Nintendo DS in 2005. It was followed by two expansion packs, Dinosaur Digs and Marine Mania, which were released in 2002, as well as a sequel, Zoo Tycoon 2, released in 2004.