The Radioactive expansion to the award-winning RoboRally board game features formidable hazards for players programming Twonky and the other robots. New board elements combine with favorite elements from previous releases for a fast-paced, unpredictable romp through the Widget Factory.The Radioactive expansion includes three new game boards for use with the original RoboRally board game.Expands: RoboRally Other Expansions: RoboRally - Armed and Dangerous RoboRally - Grand Prix RoboRally - Crash and Burn - BoardGameGeek