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 Eureka!
Completed For the Republic.
Completed The Legend of the Star.
Got banned from all the Strip's casinos.
Picked 50 pockets.
Healed 10,000 points of damage with food.
Won 30 games of Caravan.
Completed No Gods, No Masters.
Completed Wild Card.
Installed 20 weapon mods.
Won 3 games of Caravan.
Caused 10,000 damage with Explosives.
Caused 10,000 damage with Melee Weapons.
Healed 10,000 points of damage with Stimpaks.
Played the game from start to finish in Hardcore Mode.
Completed Veni, Vidi, Vici.
Completed Render Unto Caesar.
Completed Arizona Killer.
Completed Talent Pool.
Recruited all companions.
Played 10 hands of Blackjack.
Discovered all snow globes.
Caused 10,000 damage with Energy Weapons.
Caused 10,000 damage with Unarmed weapons.
Hacked 25 terminals.
Played 10 spins of Slots.
Played 10 spins of Roulette.
You Discovered 125 locations.
Reached 30th level.
Completed Return to Sender.
Caused 10,000 damage with Guns.
Completed All or Nothing.
Made 50 Speech challenges.
Repaired 30 items.
Completed The House Always Wins.
Completed You'll Know It When It Happens.
Picked 25 locks.
Reached 20th level.
Discovered 50 locations.
Sold 10,000 caps worth of goods.
Completed Volare!
Completed That Lucky Old Sun.
Completed Ring-a-Ding-Ding.
Recruited a companion.
Completed G.I. Blues.
Reached 10th level.
Completed They Went That-a-Way.
Crafted 20 items.
Completed Come Fly With Me.
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.
Reactivated all of the Sink's robotic assistants.
Completed Old World Blues.
Made up your mind... about your brain.
Recovered X-13 cardiac regulator sneaky suit!
Recovered X-8 vertebrae-pulse-de-sensitizer frequency!
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.
Caused 10,000 damage with Gun Runners' Arsenal (GRA) Weapons.
Complete any three Gun Runners' Arsenal (GRA) one star (*) Challenges.
Complete any three Gun Runners' Arsenal (GRA) two star (**) Challenges.
Complete any three Gun Runners' Arsenal (GRA) three star (***) Challenges.