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.
Healed 10,000 points of damage with food.
Won 3 games of Caravan.
Won 30 games of Caravan.
Completed The Legend of the Star.
Hacked 25 terminals.
Caused 10,000 damage with Unarmed weapons.
Completed Return to Sender.
Recruited a companion.
Recruited all companions.
Discovered all snow globes.
Healed 10,000 points of damage with Stimpaks.
Caused 10,000 damage with Melee Weapons.
Picked 50 pockets.
Caused 10,000 damage with Explosives.
Caused 10,000 damage with Energy Weapons.
Reached 30th level.
Made 50 Speech challenges.
Installed 20 weapon mods.
Got banned from all the Strip's casinos.
Completed Talent Pool.
Discovered 50 locations.
Completed Eureka!
Completed For the Republic.
Completed G.I. Blues.
Completed Veni, Vidi, Vici.
Completed Render Unto Caesar.
Completed Arizona Killer.
Completed All or Nothing.
Completed The House Always Wins.
Played the game from start to finish in Hardcore Mode.
Completed No Gods, No Masters.
Completed Wild Card.
Completed You'll Know It When It Happens.
Reached 20th level.
Crafted 20 items.
Sold 10,000 caps worth of goods.
Caused 10,000 damage with Guns.
Completed Volare!
Completed That Lucky Old Sun.
Picked 25 locks.
Played 10 spins of Roulette.
Played 10 hands of Blackjack.
Played 10 spins of Slots.
Completed Ring-a-Ding-Ding.
Reached 10th level.
Completed They Went That-a-Way.
Completed Come Fly With Me.
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.
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.
Completed Old World Blues.
Made up your mind... about your brain.
Recovered X-13 cardiac regulator sneaky suit!
Recovered X-8 vertebrae-pulse-de-sensitizer frequency!
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) one star (*) Challenges.
Completed any three Gun Runners' Arsenal (GRA) two star (**) Challenges.
Completed any three Gun Runners' Arsenal (GRA) three star (***) Challenges.
Caused 10,000 damage with Gun Runners' Arsenal (GRA) Weapons.
Caused 10,000 damage with unique Mojave Wasteland weapons.