Caldera Unlimited was a Zoo Tycoon 2-oriented site which had over 400 Zoo Tycoon 2 downloads, as well as Wildlife Park 2 downloads. It was created by Black Lemur and Brachiosaur(Braq) in January 2009. The site's download database received new downloads almost daily, and prospered. Popular creations included Destination South America and Wild Wetlands, and the former contents of Miocene Madness and Ultimate Africa. Caldera Unlimited was home to the second generation of Worldwide Designers United, which worked on a remade Prehistoric Pandemonium. WWDU is currently on hiatus, though some content was released at Geyser Millennium. In late February co-founder brach was removed as admin by VGnome due to alleged claims of inactivity. This was disputed by Brach briefly before he was banned from the site by VG.
On November 4th 2009, site owner VGnome was remade an administrator after a period of high tension in which he and other controversial staff members were demoted or voluntarily retired. He grew tired of staff turmoil, and destroyed the website, leaving himself the only staff and leaving it nothing but a few forums that were shock spammed in an attempt to root out members who still visit it.