From back cover:
PORKER SQUATTERS AND BETA CHAMBERS
It's shocking how the Big Mistake completely obliterated some places while others got by relatively unscathed. Freesboro falls into the latter camp, but if Genghis Tangh has his way, life will never be the same for the mutants of Gamma Terra. Before he can turn the Beta Chamber into a weapon, you must try to eject Tangh and his forces from their hideout at MedCen Park!
This D&D Gamma World™ adventure is designed for five characters of 1st level and is the feature for D&D Game Day: D&D GAMMA WORLD. Trouble in Freesboro™ includes a full-color battle map and ready-to-play encounters.