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.
Won 30 games of Caravan.
Picked 50 pockets.
Caused 10,000 damage with Explosives.
Healed 10,000 points of damage with food.
Played the game from start to finish in Hardcore Mode.
Completed Veni, Vidi, Vici.
Completed Arizona Killer.
Completed Render Unto Caesar.
Completed All or Nothing.
Completed The House Always Wins.
Caused 10,000 damage with Energy Weapons.
Completed Eureka!
Completed For the Republic.
Completed The Legend of the Star.
Caused 10,000 damage with Unarmed weapons.
Installed 20 weapon mods.
Healed 10,000 points of damage with Stimpaks.
Caused 10,000 damage with Melee Weapons.
Won 3 games of Caravan.
You Discovered 125 locations.
Completed No Gods, No Masters.
Completed Wild Card.
Got banned from all the Strip's casinos.
Played 10 spins of Slots.
Played 10 hands of Blackjack.
Played 10 spins of Roulette.
Completed Return to Sender.
Reached 30th level.
Recruited all companions.
Hacked 25 terminals.
Caused 10,000 damage with Guns.
Discovered all snow globes.
Made 50 Speech challenges.
Completed Talent Pool.
Sold 10,000 caps worth of goods.
Completed Come Fly With Me.
Completed You'll Know It When It Happens.
Reached 20th level.
Picked 25 locks.
Discovered 50 locations.
Completed G.I. Blues.
Completed Volare!
Reached 10th level.
Completed Ring-a-Ding-Ding.
Completed They Went That-a-Way.
Completed That Lucky Old Sun.
Crafted 20 items.
Recruited a companion.
Repaired 30 items.
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.
Collected 500 Sierra Madre Chips.
Recruited Dean Domino, Christine and Dog.
Evacuated Zion.
Scouted the Zion Valley for signs of the White Legs.
Crushed the White Legs.
Arrived at Zion.
Resupplied Daniel and the Sorrows.
Recovered X-13 cardiac regulator sneaky suit!
Reactivated all of the Sink's robotic assistants.
Made up your mind... about your brain.
Completed Old World Blues.
Recovered X-8 vertebrae-pulse-de-sensitizer frequency!
Found all of ED-E's upgrades in the Divide.
Decided the fate of all the Divide dwellers.
Completed Lonesome Road.
Acquired all upgrades for the Divide's signature weapon.
Detonated all of the warheads in the Divide.
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.