Giant mole rat

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.

Biology
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 it's back.

Appearances
The giant mole rat was cut from Fallout 3.