Gregg Mayles reveals Grunty Industries design docs for Banjo-Tooie Posted on July 6, 2015July 8, 2015 by D. B Jones Well, these look fairly simple and easy to wrap you head around. This folks, is why Gregg Mayles designs the best games. Share this: Share on X (Opens in new window) X Share on Facebook (Opens in new window) Facebook Like Loading...