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.
Completed All or Nothing.
Completed The House Always Wins.
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.
Caused 10,000 damage with Explosives.
Picked 50 pockets.
Recruited all companions.
Healed 10,000 points of damage with food.
Won 30 games of Caravan.
Installed 20 weapon mods.
Hacked 25 terminals.
Healed 10,000 points of damage with Stimpaks.
Caused 10,000 damage with Unarmed weapons.
Reached 30th level.
Caused 10,000 damage with Melee Weapons.
Got banned from all the Strip's casinos.
Sold 10,000 caps worth of goods.
You Discovered 125 locations.
Played the game from start to finish in Hardcore Mode.
Completed No Gods, No Masters.
Completed Wild Card.
Made 50 Speech challenges.
Discovered all snow globes.
Won 3 games of Caravan.
Completed Return to Sender.
Reached 20th level.
Completed Volare!
Caused 10,000 damage with Guns.
Completed The Legend of the Star.
Caused 10,000 damage with Energy Weapons.
Discovered 50 locations.
Picked 25 locks.
Completed That Lucky Old Sun.
Completed Talent Pool.
Played 10 spins of Roulette.
Played 10 hands of Blackjack.
Played 10 spins of Slots.
Completed Ring-a-Ding-Ding.
Reached 10th level.
Completed G.I. Blues.
Completed They Went That-a-Way.
Completed Come Fly With Me.
Recruited a companion.
Repaired 30 items.
Crafted 20 items.
Completed Ain't That a Kick in the Head.
Trapped Father Elijah in the Sierra Madre's Vault.
Confronted Father Elijah in the Sierra Madre's Vault.
Collected 500 Sierra Madre Chips.
Completed the Sierra Madre Gala Event.
Recruited Dean Domino, Christine and Dog.
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!
Recovered X-13 cardiac regulator sneaky suit!
Reactivated all of the Sink's robotic assistants.
Found all of ED-E's upgrades in the Divide.
Detonated all of the warheads in the Divide.
Completed Lonesome Road.
Acquired all upgrades for the Divide's signature weapon.
Decided the fate of all the Divide dwellers.
Caused 10,000 damage with unique Mojave Wasteland weapons.
Completed any three Gun Runners' Arsenal (GRA) one star (*) Challenges.
Caused 10,000 damage with Gun Runners' Arsenal (GRA) Weapons.
Completed any three Gun Runners' Arsenal (GRA) two star (**) Challenges.
Completed any three Gun Runners' Arsenal (GRA) three star (***) Challenges.