Survivalist

Survivalist is a perk in Fallout, Fallout 2 and Fallout Tactics. It was unused in Fallout: New Vegas.

Fallout
With each level of this perk, you will get +20% bonus when checks are made against the Outdoorsman skill, for purposes of determining if the player receives dehydration damage (Desert random encounters) or damage from a rockfall (Mountain random encounters). The Outdoorsman skill itself does not increase.

Fallout 2 and Fallout Tactics
With this perk, you will get +25% bonus to Outdoorsman. In unpatched Fallout 2, this perk give you +40% bonus to Outdoorsman instead of 25%.

Fallout: New Vegas

 * Survivalist: An image of a Vault Boy named "perk_survivalist" can be found in the game files.

Behind the scenes
The image for this perk in Fallout, Fallout 2 and Fallout Tactics is inspired by Sylvester Stallone's character John Rambo, from the movies First Blood; Rambo: First Blood, Part Two and Rambo III.