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