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.
Played the game from start to finish in Hardcore Mode.
Completed No Gods, No Masters.
Completed Wild Card.
Completed All or Nothing.
Completed The House Always Wins.
Completed Veni, Vidi, Vici.
Completed Render Unto Caesar.
Completed Arizona Killer.
Completed Eureka!
Completed For the Republic.
Completed You'll Know It When It Happens.
Hacked 25 terminals.
Completed Ring-a-Ding-Ding.
Discovered all snow globes.
Installed 20 weapon mods.
Completed The Legend of the Star.
Recruited all companions.
Caused 10,000 damage with Energy Weapons.
Got banned from all the Strip's casinos.
Completed Talent Pool.
Caused 10,000 damage with Explosives.
Picked 25 locks.
Caused 10,000 damage with Unarmed weapons.
Caused 10,000 damage with Melee Weapons.
Healed 10,000 points of damage with Stimpaks.
Healed 10,000 points of damage with food.
Picked 50 pockets.
Completed G.I. Blues.
Completed Volare!
Discovered 50 locations.
Completed Return to Sender.
Reached 30th level.
Caused 10,000 damage with Guns.
Won 30 games of Caravan.
Completed They Went That-a-Way.
Completed That Lucky Old Sun.
Recruited a companion.
Completed Come Fly With Me.
Crafted 20 items.
Won 3 games of Caravan.
Sold 10,000 caps worth of goods.
Played 10 spins of Roulette.
Played 10 spins of Slots.
Played 10 hands of Blackjack.
Reached 20th level.
Repaired 30 items.
Reached 10th level.
Made 50 Speech challenges.
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.
Collected 500 Sierra Madre Chips.
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.
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) 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.