Full list of all 75 Fallout: New Vegas achievements worth 1,655 gamerscore. It takes around 60-80 hours to unlock all of the achievements in the base game.
The base game contains 50 achievements worth 1,000 Gamerscore, and there are 5 DLC packs containing 25 achievements worth 655 Gamerscore.
Won 30 games of Caravan.
Played the game from start to finish in Hardcore Mode.
Completed All or Nothing.
Completed The House Always Wins.
Completed The Legend of the Star.
Completed Veni, Vidi, Vici.
Completed Render Unto Caesar.
Completed Arizona Killer.
Completed Eureka!
Completed For the Republic.
Completed You'll Know It When It Happens.
Completed Return to Sender.
Completed No Gods, No Masters.
Completed Wild Card.
Completed Talent Pool.
Got banned from all the Strip's casinos.
Played 10 spins of Roulette.
Played 10 hands of Blackjack.
Reached 30th level.
Played 10 spins of Slots.
Completed Ring-a-Ding-Ding.
Discovered all snow globes.
Picked 50 pockets.
Hacked 25 terminals.
Recruited all companions.
Completed Volare!
You Discovered 125 locations.
Completed G.I. Blues.
Caused 10,000 damage with Explosives.
Reached 20th level.
Made 50 Speech challenges.
Caused 10,000 damage with Unarmed weapons.
Healed 10,000 points of damage with Stimpaks.
Healed 10,000 points of damage with food.
Caused 10,000 damage with Energy Weapons.
Completed That Lucky Old Sun.
Discovered 50 locations.
Installed 20 weapon mods.
Picked 25 locks.
Completed They Went That-a-Way.
Completed Come Fly With Me.
Caused 10,000 damage with Guns.
Reached 10th level.
Caused 10,000 damage with Melee Weapons.
Sold 10,000 caps worth of goods.
Recruited a companion.
Repaired 30 items.
Crafted 20 items.
Won 3 games of Caravan.
Completed Ain't That a Kick in the Head.
Completed the Sierra Madre Gala Event.
Recruited Dean Domino, Christine and Dog.
Collected 500 Sierra Madre Chips.
Confronted Father Elijah in the Sierra Madre's Vault.
Trapped Father Elijah in the Sierra Madre's Vault.
Evacuated Zion.
Crushed the White Legs.
Scouted the Zion Valley for signs of the White Legs.
Resupplied Daniel and the Sorrows.
Arrived at Zion.
Completed Old World Blues.
Made up your mind... about your brain.
Recovered X-8 vertebrae-pulse-de-sensitizer frequency!
Reactivated all of the Sink's robotic assistants.
Recovered X-13 cardiac regulator sneaky suit!
Detonated all of the warheads in the Divide.
Completed Lonesome Road.
Found all of ED-E's upgrades in the Divide.
Decided the fate of all the Divide dwellers.
Acquired all upgrades for the Divide's signature weapon.
Completed any three Gun Runners' Arsenal (GRA) three star (***) Challenges.
Completed any three Gun Runners' Arsenal (GRA) two star (**) Challenges.
Completed any three Gun Runners' Arsenal (GRA) one star (*) Challenges.
Caused 10,000 damage with unique Mojave Wasteland weapons.
Caused 10,000 damage with Gun Runners' Arsenal (GRA) Weapons.