Giant rats and rad rats are oversized versions of pre-War creatures.
They differentiate in color, being black, gray, or white.
These rats are larger than mole rats and humans.
Giant rat pup
The bigger version is equal in size to a mole rat. As a result of radiation exposure, it became a little bigger and a little stronger than the smaller version. The species that exist in the Mojave have acquired white hair, blue glowing eyes, light brown color, and are bigger than the normal species.
Rodent of unusual size
Appears with Wild Wasteland.
Unnaturally large sized rodent
These are uniquely large giant rats, with only two in existence in Fallout: New Vegas. They are identical in appearance to other giant rats in the Mojave Wasteland, except for size. They are more aggressive and will attack on sight along with any nearby mutated rats.