Once, t so long ago, scientists played with genes like toys, and created computers that thought and dreamed. Then came the Final Wars, and the rise of the Gamma World. Now, new species of plants and animals fill the places humanity once ruled, and things that were once tools prey on the descendants of their makers. This first supplement for the popular Gamma World campaign setting covers things both animal and mechanical that room the post-apocalyptic future. You'll find descriptions of mutated creatures and of electronic species, with rules for use as both monsters and as player characters.