|The following is based on Fallout: Brotherhood of Steel and has not been confirmed by canon sources.|
Radbugs are the result of bugs being mutated by radiation.
They have an orb-like main body with a small head and six limbs with a claw on the end of each. When attacking, they leap forward and claw or bite a targeted creature. Apparently they have a set of human-like teeth, two fish-like eyes and an appendage somewhat resembling a tail.
Variations[edit | edit source]
Mini Radbug[edit | edit source]
This version exactly resembles the standard version of Radbug, but extremely small. Its damage is very low and requires a single shot to be killed. They often attack in groups of 5 to 10 to confuse the enemy due to their size and their speed.
Small Radbug[edit | edit source]
Similar to the Radbug but smaller. A little stronger than the Mini Radbug but slower.
Radbug[edit | edit source]
These are the most common variant of these critters. They are roughly the size of a dog and are stronger than both the mini and small versions.
Big Radbug[edit | edit source]
Bigger versions of the standard Radbug, being the same size as brahmin. These pests are found near their home in the Vault-Tec Warehouse, guarding the Secret Vault and participating in battles between the super mutants and the Church of the Lost. They are fairly resistant and their attacks cause a lot of damage.
Mini Mutant Radbug[edit | edit source]
A Radbug mutated by the special version of FEV in the Secret Vault. They have a sort of web and spikes generated around their limbs and body and, more importantly, are protected by a green exoskeletal shell. While of a similar size to the Mini Radbug the Mini Mutant does damage comparable to that of the standard Radbug and is hard to kill. Five of these critters will appear whenever a Big Mutant Radbug is killed, as if from the bigger bug's corpse.
Mutant Radbug[edit | edit source]
The same size as a Radbug, these mutated bugs have the same FEV-generated accoutrements and exoskeleton as the Mini Mutant Radbugs. They are very durable and do considerable damage, being able to kill even armoured targets in 4 or 5 shots.
Big Mutant Radbug[edit | edit source]
The same size as the Big Radbug and again having the FEV-generated mutations, these bugs are extremely durable and able to inflict even more damage than the Mutant Radbug. Additionally, whenever a Big Mutant Radbug is killed, five Mini Mutant Radbugs will emerge from its body.
Appearances[edit | edit source]
All Radbugs appear only in Fallout: Brotherhood of Steel.