Teenage Mutant Ninja Turtles Transdimensional Adventures MUTAGEN GREEN EDITION is a 256 page, hardcover sourcebook collection that presents Transdimensional TMNT, Teenage Mutant Ninja Turtles Adventures, and TMNT Guide to the Universe, including time travel rules, spaceship creation rules, dimensional magic, adventures galore, and more bonus material like tribute artwork, written memories by TMNT creators, and a surprise or two.