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.
Won 30 games of Caravan.
Healed 10,000 points of damage with food.
Won 3 games of Caravan.
Recruited all companions.
Completed All or Nothing.
Completed The House Always Wins.
Reached 30th level.
Caused 10,000 damage with Energy Weapons.
Made 50 Speech challenges.
Completed The Legend of the Star.
You Discovered 125 locations.
Hacked 25 terminals.
Completed Veni, Vidi, Vici.
Completed Render Unto Caesar.
Completed Arizona Killer.
Healed 10,000 points of damage with Stimpaks.
Caused 10,000 damage with Explosives.
Caused 10,000 damage with Unarmed weapons.
Caused 10,000 damage with Melee Weapons.
Caused 10,000 damage with Guns.
Reached 20th level.
Got banned from all the Strip's casinos.
Installed 20 weapon mods.
Discovered all snow globes.
Played the game from start to finish in Hardcore Mode.
Completed No Gods, No Masters.
Completed That Lucky Old Sun.
Completed Ain't That a Kick in the Head.
Completed Wild Card.
Picked 25 locks.
Discovered 50 locations.
Completed Return to Sender.
Picked 50 pockets.
Completed Come Fly With Me.
Repaired 30 items.
Sold 10,000 caps worth of goods.
Reached 10th level.
Completed Volare!
Completed Talent Pool.
Crafted 20 items.
Played 10 spins of Roulette.
Played 10 spins of Slots.
Played 10 hands of Blackjack.
Completed Ring-a-Ding-Ding.
Completed G.I. Blues.
Recruited a companion.
Completed They Went That-a-Way.
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.
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.
Reactivated all of the Sink's robotic assistants.
Recovered X-13 cardiac regulator sneaky suit!
Recovered X-8 vertebrae-pulse-de-sensitizer frequency!
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.
Caused 10,000 damage with unique Mojave Wasteland weapons.
Completed any three Gun Runners' Arsenal (GRA) three star (***) Challenges.
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.