from the introduction:
The World of Zendynn is a supplement for the Millenniums & Mutations game that provides a map of the known world, along with 300 creatures and 100 robots to use in designing your adventures in this post-apocalyptic world. There are versions of Zendynn that is dependent on the version of Tunnels & Trolls you are using.
from the footnotes:
Creatures for Zendynn are from the Post-Apocalyptic Fantasy Role-Playing Game Broken Urthe converted for use with Millenniums & Mutations.