From the back of the book: Fight This Mutant contains over 30 brand-new mutant monsters and races, a whole new Ancient Alliance your player characters can join or fight, a brand-new character class - the Technomancer, and 15 new neural programs from 1st through 5th levels. Usable in any d20-base post-apocalyptic or genre-mashing fantasy role playing game, the creatures, collectives, and classes found in this book will put new mutated meat on the table for the players of any science-fiction or fantasy role playing system.