On January 1st, 2010, a bonus download, the Unktehilia, the horned river monster of the Native Americans, was released for the Grassland biome, but a hack is availble that can be installed to Hysteria to convert it into the Littoral biome. On July 8, 2010, Nemo released his Littoral Landscapes pack, with 10 more pieces of foliage along with the Manipogo, a Gambo like lake creature. It contained over 10 pieces of foliage along with its own theme for buildings and scenrey.

Paranoia also includes the Littoral Biome, the largest biome to date. On JPart one of the Hysteria Scenery was released. Hysteria Animals part 2 included the Mokele-Mbembe, Cockatrice, Gambo, Kraken, and Mongolian Death Worm an was relesed in early July. After that Hysteria Foliage was released, however the man-eating tree was not included due to animation problems. It included the Littoral Biome, and Updated Biome Shell for EA, 5 Animals, namely the Jersey Devil, Loch Ness Monster, Ogopogo, Bunyip, and Nandi Bear. Part 1 of Hysteria was released on May 10, 2010. As stated, Hysteria is gradually being released. Panic was relesed on Halloween, October 31 (of what year?). Same goes for the Unktehilia, modeled after a Mosasaur (Minus the Horns). For example, the ogopogo was said to be an extinct whale, so Z-Studio modeled it after it. Paranoia's animals also offered much realism, in the fact that the descriptions of the animals were accurate. Animals such as the European Dragon, Cockatrice, Mothman, and Quetzalcoatl were coded and rigged in such a way that their wings would fold and open. Paranoia also had breakthroughs in animal animations and their models. There was only one animal in Hysteria that was not a new model, the Chupacabra, which was heavly meshed in 3dsmax from a Giant Sable Antelope. Hysteria is important to the modding community because it contained new models that were rigged with common animal animations. So far 3/4 of all Hysteria content has been released. Hysteria is gradually being released with the game known as Dungeon of Riddles. It contained 20 animals, 10 plants, and over 20 pieces of scenery and other objects.

Panic was relesed on October 31, Halloween. Paranoia is a mythical, cryptid, and Gothic expantion containing many animals that have not yet been made, or even attempted. Paranoia has over 40 animals planned, 30 or so of which, released.

It is divided into 2 parts, Panic and Hysteria. Zoo Tycoon 2 Paranoia! is a Usermade Expansion by the designing team Z-Studio.

Zoo tycoon 2 unicorn