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.
Caused 10,000 damage with Melee Weapons.
Caused 10,000 damage with Unarmed weapons.
Completed Eureka!
Completed For the Republic.
Played the game from start to finish in Hardcore Mode.
Completed Veni, Vidi, Vici.
Completed Render Unto Caesar.
Completed Arizona Killer.
Got banned from all the Strip's casinos.
Healed 10,000 points of damage with food.
Completed All or Nothing.
Completed The House Always Wins.
Picked 50 pockets.
Won 30 games of Caravan.
Won 3 games of Caravan.
Completed No Gods, No Masters.
Completed Wild Card.
Completed Talent Pool.
Healed 10,000 points of damage with Stimpaks.
Caused 10,000 damage with Explosives.
Installed 20 weapon mods.
Caused 10,000 damage with Energy Weapons.
Completed You'll Know It When It Happens.
Hacked 25 terminals.
Completed Volare!
You Discovered 125 locations.
Completed The Legend of the Star.
Reached 30th level.
Discovered all snow globes.
Recruited all companions.
Completed Ring-a-Ding-Ding.
Made 50 Speech challenges.
Completed Return to Sender.
Reached 20th level.
Sold 10,000 caps worth of goods.
Played 10 hands of Blackjack.
Played 10 spins of Roulette.
Played 10 spins of Slots.
Completed G.I. Blues.
Discovered 50 locations.
Completed They Went That-a-Way.
Crafted 20 items.
Caused 10,000 damage with Guns.
Completed Come Fly With Me.
Completed That Lucky Old Sun.
Picked 25 locks.
Reached 10th level.
Recruited a companion.
Repaired 30 items.
Completed Ain't That a Kick in the Head.
Confronted Father Elijah in the Sierra Madre's Vault.
Completed the Sierra Madre Gala Event.
Trapped Father Elijah in the Sierra Madre's Vault.
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.
Recovered X-13 cardiac regulator sneaky suit!
Recovered X-8 vertebrae-pulse-de-sensitizer frequency!
Completed Old World Blues.
Made up your mind... about your brain.
Reactivated all of the Sink's robotic assistants.
Completed Lonesome Road.
Detonated all of the warheads in the Divide.
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 Gun Runners' Arsenal (GRA) Weapons.
Caused 10,000 damage with unique Mojave Wasteland weapons.