Microsoft and Blue Fang Games today released a $5 downloadable, miniature expansion for their Zoo Tycoon 2 strategy game on the PC. The add-on, called the Dino Danger Pack, throws into the mix four dinosaurs--the Carnotaurus, Styracosaurus, Triceratops, and Tyrannosaurus Rex. The necessary accessories, such as electrified fences to cage the prehistoric animals and special foods so they don't eat park guests, are also included. For more information on the Dino Danger Pack, which is rated E10+, visit the game's Web site.