There are all manner of mods available for Fallout: New Vegas these days, and this list covers everything from small, quality-of-life improvements to full-blown extra story content. It’s a great RPG that's also over a decade old, and it’s built to be replayed. Just a desert to wander and a headache to cure. No vault to escape, no good intentions to follow.
Fallout: New Vegas’ half-life is longer than the rest of the series to me, because it starts with a simple concept: a bullet to the brain, and a hunt for whodunnit. Whenever I get the urge to play a Fallout game, any Fallout game, I end up crossing the Mojave Desert in search of revenge.