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.
Caused 10,000 damage with Unarmed weapons.
Completed Render Unto Caesar.
Completed Arizona Killer.
Installed 20 weapon mods.
Caused 10,000 damage with Explosives.
Picked 50 pockets.
Healed 10,000 points of damage with food.
Caused 10,000 damage with Energy Weapons.
Caused 10,000 damage with Melee Weapons.
You Discovered 125 locations.
Healed 10,000 points of damage with Stimpaks.
Completed Eureka!
Completed For the Republic.
Completed You'll Know It When It Happens.
Reached 30th level.
Hacked 25 terminals.
Caused 10,000 damage with Guns.
Recruited all companions.
Reached 20th level.
Completed Talent Pool.
Picked 25 locks.
Got banned from all the Strip's casinos.
Made 50 Speech challenges.
Crafted 20 items.
Discovered all snow globes.
Completed The Legend of the Star.
Repaired 30 items.
Completed Return to Sender.
Completed Volare!
Discovered 50 locations.
Completed G.I. Blues.
Reached 10th level.
Completed That Lucky Old Sun.
Completed Come Fly With Me.
Sold 10,000 caps worth of goods.
Won 30 games of Caravan.
Won 3 games of Caravan.
Played 10 hands of Blackjack.
Played 10 spins of Roulette.
Played 10 spins of Slots.
Played the game from start to finish in Hardcore Mode.
Completed No Gods, No Masters.
Completed Wild Card.
Completed Ring-a-Ding-Ding.
Completed They Went That-a-Way.
Recruited a companion.
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.
Completed the Sierra Madre Gala Event.
Recruited Dean Domino, Christine and Dog.
Collected 500 Sierra Madre Chips.
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-13 cardiac regulator sneaky suit!
Recovered X-8 vertebrae-pulse-de-sensitizer frequency!
Reactivated all of the Sink's robotic assistants.
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.
Caused 10,000 damage with Gun Runners' Arsenal (GRA) Weapons.
Completed any three Gun Runners' Arsenal (GRA) three star (***) Challenges.
Completed any three Gun Runners' Arsenal (GRA) one star (*) Challenges.
Completed any three Gun Runners' Arsenal (GRA) two star (**) Challenges.
Caused 10,000 damage with unique Mojave Wasteland weapons.