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For other uses of the term, see Snake (disambiguation).
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This is a lore summary, presenting intradiegetic or in-universe information about the subject. For game characteristics and similar data, consult the table on the right.
Game-specific articles
Van BurenHag snake
Two-headed rattlesnake
Fallout: BoS 2Texas Rattler

Snakes are legless, elongated reptiles classified as part of the suborder Serpentes before the Great War. Afterwards, a number of species have mutated into forms resembling snakes. Although they have yet to appear directly in a Fallout game, the suborder has survived and even thrived, judging by the amount of snake-related expressions and several names that appear throughout the games.[1]


All of the following variants were planned for inclusion in one or more games, but were cut.

Pit viper

Gameplay article:

The pit vipers were giant snakes worshiped by the Vipers. Killian Darkwater mentions that fact as well, though he does not identify them by name.

Hag snake

Gameplay article:

A hagfish that mutated into a form resembling a snake.

Two-headed rattlesnake

Gameplay article:

A monstrous snake with a bifurcated spine and two heads, bred by the Vipers out east.

Texas Rattler

Texas Rattler.jpg

A giant, mutated rattlesnake. The mutation has diluted its poison, making it merely sickening instead of lethal, but it has also made the snake into a giant, monstrous reptile. Coming in at six feet tall (over 180 cm) and with 500 pounds (225 kg) of weight, it doesn't need the bite to kill a full grown man.


  1. Numerous expressions in Fallout, Fallout 2, Fallout: New Vegas, and more.