Radroach (Fallout: New Vegas)

Radroaches are creatures found in the Mojave Wasteland in 2281.

Background
Great American cockroaches, colloquially called radroaches or simply giant cockroaches. They are giant versions of the cockroach species that have been mutated by atomic fallout. The mutations they have undergone include massively increased size, and now they are about as large as house cats.

Biology
Not nearly as common as in the Capital Wasteland, radroaches mostly inhabit abandoned homes and buildings (such as the Basincreek Building) to scavenge on food that was left behind by whoever previously lived there. Some can also be found in the toxic dumps and on or around the roads in between Goodsprings and Primm, as well as being able to survive in the hostile and toxic environment of the Sierra Madre and the Cloud.

Gameplay attributes
Radroaches are not normally aggressive if the player character keeps his distance. They are however, very territorial and will attack if the player seems to threaten them, either by having a weapon drawn, invading their habitat, battling another enemy nearby (which is limited to less than a foot around the creature), or attacking them directly. Generally, they will spread their wings and make distinct clicking sounds in warning before attacking.

Radroach
This is a normal radroach, with all the qualities mentioned above. This creature doesn't make much of a challenge for any level of PC. A single punch without any weapon can kill them easily.

Irradiated radroach
The irradiated radroach appears the same as a "normal" radroach but with the "aura" of a feral ghoul reaver and the ability to heal itself with a radiation blast similar to a Glowing One. It does not appear in Fallout: New Vegas without the use of console commands.
 * The Irradiated radroach might have been removed from the FNV content due to the prolonged residual radiation that it leaves behind well past 24 game hours after it's death.

Appearances
The Radroach appears in Fallout: New Vegas and its Add-on Dead Money.