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 Veni, Vidi, Vici.
Completed Render Unto Caesar.
Completed Arizona Killer.
Completed All or Nothing.
Completed The House Always Wins.
Completed Eureka!
Completed For the Republic.
Won 30 games of Caravan.
Got banned from all the Strip's casinos.
Picked 50 pockets.
Caused 10,000 damage with Explosives.
Installed 20 weapon mods.
Played the game from start to finish in Hardcore Mode.
Completed No Gods, No Masters.
Completed Wild Card.
Healed 10,000 points of damage with food.
Caused 10,000 damage with Unarmed weapons.
Caused 10,000 damage with Energy Weapons.
Caused 10,000 damage with Melee Weapons.
Completed Return to Sender.
Completed You'll Know It When It Happens.
Reached 30th level.
Hacked 25 terminals.
Completed Volare!
You Discovered 125 locations.
Discovered all snow globes.
Completed Ring-a-Ding-Ding.
Recruited all companions.
Crafted 20 items.
Completed Talent Pool.
Made 50 Speech challenges.
Won 3 games of Caravan.
Healed 10,000 points of damage with Stimpaks.
Completed The Legend of the Star.
Completed That Lucky Old Sun.
Reached 20th level.
Caused 10,000 damage with Guns.
Picked 25 locks.
Discovered 50 locations.
Completed G.I. Blues.
Played 10 spins of Roulette.
Played 10 hands of Blackjack.
Played 10 spins of Slots.
Reached 10th level.
Sold 10,000 caps worth of goods.
Completed They Went That-a-Way.
Completed Come Fly With Me.
Recruited a companion.
Repaired 30 items.
Completed Ain't That a Kick in the Head.
Confronted Father Elijah in the Sierra Madre's Vault.
Trapped 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.
Crushed the White Legs.
Evacuated Zion.
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.
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.
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) one star (*) Challenges.
Caused 10,000 damage with unique Mojave Wasteland weapons.