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