Difficulty/Fallout: New Vegas

Difficulty is a modifiable in-game setting

Overview
Fallout: New Vegas has five difficulty settings, excluding Hardcore Mode: Very Easy, Easy, Normal, Hard and Very Hard. Difficulty modifies damage dealt to enemies and damage dealt to the player; lower settings decrease damage received and increase damage dealt, while higher levels increase damage received and decrease damage dealt.

Unlike Fallout 3, difficulty does not affect the overall amount of XP gained.