Fallout: New Vegas - Honest Hearts

Summary pulled directly from Steam - Some text may only be applicable to Steam platform

An expedition into the unspoiled wilderness of Utah's Zion National Park goes horribly wrong when your caravan is ambushed by a tribal raiding band. As you try to find a way back to the Mojave you become embroiled in a war between tribes and a conflict between a New Canaanite missionary and the mysterious Burned Man. The decisions you make will determine the fate of Zion.

Key features

New Terrain: Navigate the highs and lows of the steep canyon walls, caves, riverbeds, waterfalls and explore the lush landscapes and rugged terrain in beautiful and sprawling Zion Canyon.
New Enemies: From the deadly Yao Guai and exotically lethal Greek Geckos to new hostile tribals, Zion Canyon is as dangerous as it is beautiful.
New Perks and Weapons: Survive the wild with Tribal Wisdom or exact increased damage with Eye for Eye. Honest Hearts offers a host of new perks and weapons including the .45 Auto Pistol, .45 Auto Submachine Gun, the Compliance Regular, Fire Bombs, War Clubs, and Yao Guai Gauntlets.