The main plot of New Vegas is set in the year 2281, 204 years after dropping the bombs and four years after the events of Fallout 3. Although it is not a direct successor, it does bring back several of Fallout 2's features. The Courier is the character that players control. 

The Courier is attacked, robbed of the package, shot, and then buried in a cemetery while bringing it across the Mojave Desert to the city of New Vegas, which is now Las Vegas. 

In the end, the Courier is exhumed and heals from their wound. 

The Courier then sets out on a Quest to track down their would-be assassin and retrieve the package, making allies and foes among various warring factions along the way. Ultimately, The Courier finds himself involved in a struggle to decide who will rule New Vegas and the Mojave Wasteland. Players can check out more sequels of Fallout: New Vegas Ultimate Edition.

• Fallout
• Fallout 2
• Fallout 3
• Fallout 4
• Fallout: brotherhood of steel
• Fallout Tactics: brotherhood of steel
• Fallout: New California
• Fallout 76

Key Feature :

• Obsidian Entertainment aimed to improve existing elements while integrating some old and new features into the series while keeping the gameplay from Fallout 3 in Fallout: New Vegas.
• There are several upgrades and new features. The V.A.T.S. system has been upgraded with several further V.A.T.S.-specific attacks, and several kill animations have been created for various of the Game's melee weapons.
• Weapons now respond more quickly and are more accurate. Guns can have iron sights, except for some energy weapons and some larger guns.
• The Game's Character Creation part has been streamlined to take less time than Fallout 3, and after characters are created, players can bypass the tutorials and start exploring the Wasteland.
• To discourage players from being too strong too early in the Game, the player can only select one Perk per two levels as opposed to every Level as in Fallout 3.
• The "Big Guns" and "Small Guns" talents are combined into one skill called "Guns," and the survival skill was added and modified from the Outdoorsman skill from the first and second games.
• Players can temporarily improve their talent by reading a skill magazine matching it, which can be acquired from vendors or found throughout the Mojave Wasteland. Specific Perks can further enhance the results of this.
• Players can gamble by going to casinos spread throughout the Wasteland and buying chips with one of the three possible currencies. 
• The success rate of the blackjack, slots, or roulette games at these casinos depends on the player's Luck stat. 
• The caravan is a card Game where players can play with specific individuals outside the casinos. It was created for the Game and had its own rules.