Richard Mead was a construction worker who was working on the Apache Bluffs nuclear power plant. Unknown to him, a group of terrorists had sabotage the reactor. One day, when Richard was working on the reactor a leak devolped in the reactor, and Richard was bombarded with a large does of radiation. However, instead of killing him outright, the radiation mutated his body totally out of control. Richard became a super-humanly powerful being. The pain from the mutation was excrutionating and Richard went on a rampage. Only a few were able to escape his frenzy. After leveling the entire power plant, Richard fled.

He has traveled all over the country, always causing destruction in his wake. Many super-heroes have tried to capture him, but not have been successful. Richard has been dubbed "Unstoppable" by the press. Super-villains have used Unstoppable in the past, but he doesn't remain in any place long. He's always wandering never staying in one place long.

Not much is left of the original Richard Mead. Unstoppable is a brutish individual, given to violent outbursts. He's quite aware that he's a monster, and plays the destructive monster for all its worth. It takes very little to get Unstoppable into berserk rage, taunting him is probably the easiest.

Other super-villains have used guile on Unstoppable to get him to do their bidding. Unstoppable isn't very bright, and is easily fooled. Mentalists seem to have easiest time dealing with Unstoppable.

"Will pound you!"

The radiation accident has turned Richard into a super-human powerhouse. He's super-humanly strong, able to resist almost any injury, and is a lot faster than a person his size probably should be. If there is one thing that Unstoppable is good at it is causing massive destruction. Unstoppable isn't subtle, if an attack doesn't work then he'll unleash an even more destructive attack.

Unstoppable is a huge individual with bulging muscles all over his body. The radiation accident has caused all of his veins to bulge out, and they now appear to be black lines that criss-cross his body. Even his eyes have become black pools. They seem to flash when he's angered. Unstoppable wears a black jumpsuit for a costume, along with matching boots and gloves. He was given the costume by a super-villain that he once served. The chest of the jumpsuit is open in the front revealing his inhumanly muscular chest. Otherwise Unstoppable is totally hairless.