Fallout: New Vegas

Obsidian Entertainment's 2010 RPG delivered the most reactive open world ever made in just 18 months of development. Its faction reputation system dynamically changes quest outcomes and character dialogues, offering over 50 unique endings based on player choices. The sharp writing and multiple endings make it the definitive post-apocalyptic RPG, even with its legendary bugginess. Its world feels alive, reacting to every decision you make.