Fallout: 10 Reasons New Vegas Is The Best One
8. A Hardcore Survival Mode
Fallout has never been an explicit survival game. It's about surviving in a post-apocalyptic world, but the challenges to your survival come in the form of big mutant ogres. However, New Vegas took the extra step of adding an additional hardcore mode in which your survival was hinged on access to fresh water, food and sleep.
It was an incredibly small addition and it is not like its absolutely world-changing. However, it was there. It's emblematic of Obsidian's approach to making the game. There are a bunch of small features that can be utilised just as easily as they can be ignored.
The survival mode was also one of the best ways to play the game as it added a new layer of depth. There is a reason that most of the mods for Bethesda game are some variant on survival mechanics. People want to role-play and adding elements of survival into the game is the best way to do that.