1 Background 2 Characteristics 3 Appearances 4 References All Commonwealth super mutants are the result of The Institute's research into FEV,1 which began in 2178 under the auspices of Doctor Frederick. Super Mutant variant codes: Super Mutant- 0001A00C, 000A1471, 000EDCC6, 000EDCCF, 000EDCD0 Hi, Just experienced a Super Mutant Behemoth spawn (a long with 2 giant radscorpions and 3 Brute mutants) just when the wastelander equipped with explosives exploded.