While reassembling my library, I found my third edition Gamma World game. (This is the one with the ACT table, not 3rd edition as in D&D 3e d20 system.) My old notes for a long-past game were inside, so I tidied them up and called the gang. Their mission was to recover something stolen by the Hoops. It was a simple but fun game, with one guy jokingly saying he'll probably never look at his own rabbits the same way again.
Anyway, have you played Gamma World, and which edition is your favorite? Also, have you ever used the ACT table for D&D?