|The following is based on Fallout 3 cut content and has not been confirmed by canon sources.|
Giant mole rat was a creature that was cut from Fallout 3. It was first revealed when Bethesda released all the concept art done by Adam Adamowicz.
The giant mole rat is a very large mutation of the regular mole rat found in the game. In the two pieces of concept art it is shown with a rider on its back.
The giant mole rat was cut from Fallout 3.
Giant mole rat concept art by Adam Adamowicz.