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.
You Discovered 125 locations.
Completed Volare!
Won 30 games of Caravan.
Won 3 games of Caravan.
Discovered all snow globes.
Healed 10,000 points of damage with food.
Completed Talent Pool.
Picked 50 pockets.
Got banned from all the Strip's casinos.
Completed All or Nothing.
Completed Eureka!
Completed For the Republic.
Completed You'll Know It When It Happens.
Completed Veni, Vidi, Vici.
Completed Render Unto Caesar.
Completed Arizona Killer.
Recruited all companions.
Caused 10,000 damage with Energy Weapons.
Caused 10,000 damage with Melee Weapons.
Caused 10,000 damage with Explosives.
Completed Return to Sender.
Completed The House Always Wins.
Played the game from start to finish in Hardcore Mode.
Completed No Gods, No Masters.
Completed Wild Card.
Played 10 spins of Roulette.
Installed 20 weapon mods.
Completed The Legend of the Star.
Completed That Lucky Old Sun.
Reached 30th level.
Healed 10,000 points of damage with Stimpaks.
Hacked 25 terminals.
Reached 20th level.
Caused 10,000 damage with Unarmed weapons.
Made 50 Speech challenges.
Sold 10,000 caps worth of goods.
Completed Ring-a-Ding-Ding.
Played 10 hands of Blackjack.
Discovered 50 locations.
Recruited a companion.
Completed G.I. Blues.
Played 10 spins of Slots.
Completed They Went That-a-Way.
Picked 25 locks.
Completed Come Fly With Me.
Reached 10th level.
Crafted 20 items.
Caused 10,000 damage with Guns.
Repaired 30 items.
Completed Ain't That a Kick in the Head.
Collected 500 Sierra Madre Chips.
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.
Crushed the White Legs.
Evacuated Zion.
Scouted the Zion Valley for signs of the White Legs.
Resupplied Daniel and the Sorrows.
Arrived at Zion.
Reactivated all of the Sink's robotic assistants.
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!
Found all of ED-E's upgrades in the Divide.
Detonated all of the warheads in the Divide.
Completed Lonesome Road.
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 unique Mojave Wasteland weapons.
Completed any three Gun Runners' Arsenal (GRA) two star (**) Challenges.
Caused 10,000 damage with Gun Runners' Arsenal (GRA) Weapons.
Completed any three Gun Runners' Arsenal (GRA) one star (*) Challenges.