http://news.discovery.com/animals/super-muscle-mutation-fish-mammals-110621.html

I was looking on my mobile news this morning when this came up. All that needs to be done is for this gene to be programmed into a Virus, with a possible side effect of the destruction of brain tissue, and you have yourself a super mutant.

Cheers,
Mk II

Just add a few doses of radiation and insanity of isolation and you have yourself a skin colored super mutant.

that pic of the muscle man looks like one of those super mutants but still normal skin

lmfao