From the back cover: Originally published in 1976, Metamorphosis Alpha has been adapted, expanded, and update to fit in the Amazing Engine system. This is a complete, stand-alone role-playing game: all the rules you need to play are included within. This rulebook includes new skills, mutations, new races, high-tech weaponry and gadgets, and robots, as well as a detailed description of the sihp's many ecosystems. - BoardGameGeek