From the Publisher's On-line Catalog:
Have you ever wanted to play T&T in a true post-apocalyptic setting? Now for the first time ever you have the chance to do so. Gamma-Trollworld is an 80-page 6-by-9-inch spiral-bound book that is 100% 7.5v Edition compatible (and all earlier editions). The new rules easily fall in line with 7.5v Edition and cover everything you need to run a post-apocalyptic T&T campaign, making it very easy to bring any T&T character into Gamma-Trollworld. Also included is Truck Stop Blues and Death Dwarves Attack, two ready-to-run GM adventures. If you don't want your T&T characters to stay in a post-apocalyptic setting, you could always just portal them in for a one-shot adventure and then send them back. What T&T character wouldn't want a blaster pistol as a weapon? In Gamma-Trollworld, the Rogue has all-new abilities.