Endurance/Fallout: New Vegas

Endurance is one of the seven primary statistics in the SPECIAL system.

Gameplay
Endurance determines a character's environmental resistances (poison, radiation), Hit Points, and Healing Rate, as well as the starting levels of the Unarmed and Survival skills. It also determines the number of implants allowed.

Permanent

 * Endurance Implant available at the New Vegas Medical Clinic (+1)
 * Intense Training perk (+1)
 * Completing the quest The Apocalypse or The End will allow raising any one primary statistic by 1.

Temporary

 * Armor and clothing
 * Brahmin-skin outfit, wasteland legend outfit, wasteland settler outfit, wasteland wanderer outfit (+1)
 * Atomic-valence tri-radii-oscillator, Valence radii-accentuator (+1)
 * Advanced Riot Gear, Courier duster, Marked Trooper Armor (+1)
 * Traits
 * Claustrophobia (+1 while outdoors, but -1 indoors)
 * Early Bird (+2 between 6am and 12pm, but -1 between 6pm and 6am)
 * Buffout (+3)
 * Sierra Madre martini (+4)