Icon disambig.svg
For an overview of giant rats, see giant rat.

 
Gametitle-FNV.png
Gametitle-FNV.png
Oh I assure you, sir, they are very real and very large. Please do be careful. Wild WastelandJane on "Rodents of unusual size"

Giant rats are creatures living in the Mojave Wasteland in 2281.

Characteristics[edit | edit source]

Biology[edit | edit source]

Giant rats appear to be larger versions of normal pre-War rats, although they appear to have lost most of their fur, they have spotted skin like molerats, and have glowing turquoise eyes. Similar to their pre-war counterparts, they have very large incisors. Giants rats are often found in darker areas, such as Cerulean Robotics, the broc flower cave and Vault 11.

Gameplay attributes[edit | edit source]

Giant rats will not attack on sight, but will stand defensively in the way bighorners do when an enemy is spotted. Only when the player character comes into close proximity or attacks them will they become hostile. Certain rats, such as the ones found in Freeside, will not attack despite being assaulted. As with most mutated animals, giant rats will not attack if the Courier has the Animal Friend perk. Giant rats are also susceptible to, and count towards, the Animal Control perk. Occasionally, idle rats will make a sound similar to a howl.

Variants[edit | edit source]

Giant rat[edit | edit source]

Giant rat.png

Giant rats are light brown color, with glowing blue eyes and white hair down its back. The standard giant rat is equal in size to a mole rat. They are quite fast and attack in groups of three to seven.

Name (Base ID)StatisticsBehaviorAbilitiesItems
Giant rat
000e8e95
00136b11
Level
2
Experience Points
?
Perception
4
Hit Points
24
Damage Threshold
0
Damage Resistance
0%
Gamebryo AI attributes#Aggression
Aggressive: Will attack enemies on sight.Icon required.pngIcon optional.pngIcon optional.png
Gamebryo AI attributes#Confidence
Brave: Will avoid/flee from threats only if severely outmatched.Icon required.pngIcon required.pngIcon required.pngIcon optional.png
Gamebryo AI attributes#Assistance
Helps friends: Will help friends and allies.Icon required.pngIcon required.png
Attack
Melee (15 Damage)
Giant rat
001040bc
001183a4
Level
3
Experience Points
?
Perception
3
Hit Points
40
Damage Threshold
0
Damage Resistance
0%
Gamebryo AI attributes#Aggression
Unaggressive: Will not initiate combat.Icon optional.pngIcon optional.pngIcon optional.png
Gamebryo AI attributes#Confidence
Cowardly: Will always avoid combat/flee.Icon optional.pngIcon optional.pngIcon optional.pngIcon optional.png
Gamebryo AI attributes#Assistance
Helps nobody: Will not help anyone.Icon optional.pngIcon optional.png
Attack
Melee (15 Damage)

Giant rat pup[edit | edit source]

Giant rat.png

These young rats look identical to fully grown giant rats, albeit smaller than the standard giant rat. They usually don't attack but instead run away. However, if pups are encountered with normal giant rats, they will accompany them in the assault.

Name (Base ID)StatisticsBehaviorAbilitiesItems
Giant rat pup
0014f480
Level
1
Experience Points
?
Perception
2
Hit Points
12
Damage Threshold
0
Damage Resistance
0%
Gamebryo AI attributes#Aggression
Unaggressive: Will not initiate combat.Icon optional.pngIcon optional.pngIcon optional.png
Gamebryo AI attributes#Confidence
Cautious: Will avoid/flee from threats unless stronger than them.Icon required.pngIcon optional.pngIcon optional.pngIcon optional.png
Gamebryo AI attributes#Assistance
Helps allies: Will help allies.Icon required.pngIcon optional.png
Attack
Melee (7 Damage)

Rodent of unusual size[edit | edit source]

Giant rat.png
Perk wild wasteland.pngThe following is based on the Wild Wasteland trait and has not been confirmed by canon sources.

Found in the broc flower cave and New Vegas sewers, rodents of unusual size are the largest of the mutated rats found in the Mojave Wasteland to date. They are identical to their giant cousins, save for their increased size and attack strength. They are aggressive and will attack on sight unless the player character has the Animal Friend perk. They can sometimes be found in Vault 11 if the Wild Wasteland perk is chosen.

Name (Base ID)StatisticsBehaviorAbilitiesItems
Rodent of unusual size
00162b3d
Level
12
Experience Points
?
Perception
5
Hit Points
125
Damage Threshold
0
Damage Resistance
0%
Gamebryo AI attributes#Aggression
Aggressive: Will attack enemies on sight.Icon required.pngIcon optional.pngIcon optional.png
Gamebryo AI attributes#Confidence
Brave: Will avoid/flee from threats only if severely outmatched.Icon required.pngIcon required.pngIcon required.pngIcon optional.png
Gamebryo AI attributes#Assistance
Helps friends: Will help friends and allies.Icon required.pngIcon required.png
Attack
Melee (50 Damage)
Perk wild wasteland.pngEnd of information based on the Wild Wasteland trait.

Unnaturally large sized rodent[edit | edit source]

Giant rat.png

These are uniquely large giant rats, with only two in existence in 2281. They are found in the east central sewers, in the same room as "Sweet" Jill. Except for their size, they are identical in appearance to their smaller cousins, though are more aggressive and will attack on sight. If the Animal Friend perk is chosen, the unnaturally large rodents will not attack.

Name (Base ID)StatisticsBehaviorAbilitiesItems
Unnaturally large sized rodent
00154454
Level
6
Experience Points
?
Perception
6
Hit Points
70
Damage Threshold
0
Damage Resistance
0%
Gamebryo AI attributes#Aggression
Very aggressive: Will attack enemies and neutrals on sight.Icon required.pngIcon required.pngIcon optional.png
Gamebryo AI attributes#Confidence
Foolhardy: Will never flee or avoid anyone.Icon required.pngIcon required.pngIcon required.pngIcon required.png
Gamebryo AI attributes#Assistance
Helps friends: Will help friends and allies.Icon required.pngIcon required.png
Attack
Melee (35 Damage)

Notes[edit | edit source]

  • Every three days, two children in Freeside will be seen chasing a non-hostile giant rat. If the Courier kills the rat, the children will say "Thanks, mister/lady" and perform an eating animation on the rat (like the Courier will perform if they have the Cannibal perk). The children will still "eat" the rat even if it was reduced to a pile of goo or ash. Sometimes, they may perform this animation several feet away from the rat. Eventually, the rat will respawn and the children will resume their never-ending chase. It is likely that these children are working for Genaro, as he mentions that he has his "little helpers" who gather food for him. The children have knives and baseball bats, but they will never be able to catch up with and attack the rat.
  • Giant rats are friendly if the Courier has the Animal Friend perk, but may be hostile to companions.
  • It is possible to pickpocket a giant rat, though doing so will result in Karma loss.
  • Their meat is not used in any crafting recipe.
  • They are the only creature in the game whose tails can be severed.
Perk wild wasteland.pngThe following is based on the Wild Wasteland trait and has not been confirmed by canon sources.
  • There is a unique dialogue option with Jane in Freeside during the quest Debt Collector if the Courier has the Wild Wasteland trait. They can ask her about the "R.O.U.S" in the broc flower cave where her raided caravan lies.
Perk wild wasteland.pngEnd of information based on the Wild Wasteland trait.

Appearances[edit | edit source]

Giant rats appear in Fallout: New Vegas.

Behind the scenes[edit | edit source]

  • In the Fallout: New Vegas concept art, the giant rat has been described as "smaller than a dog but bigger than a cat."
  • The rodents of unusual size are named in reference to William Goldman's novel and film The Princess Bride. In the film and novel, rodents of unusual size (or ROUS for short) attack the protagonists. Like Fallout's rats, ROUSs are extremely large and dangerous.
  • In Fallout 2, when the Chosen One speaks to Sajag in Klamath, in the dialogue there will be mentioned that Trapper Town has problems with ROUS - rodents of unusual size.

Sounds[edit | edit source]

  • Giant rat attack
  • Giant rat battle cry
  • Giant rat hiss

Gallery[edit | edit source]

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