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.
Played the game from start to finish in Hardcore Mode.
Caused 10,000 damage with Unarmed weapons.
Caused 10,000 damage with Melee Weapons.
Completed Veni, Vidi, Vici.
Completed Render Unto Caesar.
Completed Arizona Killer.
Healed 10,000 points of damage with Stimpaks.
Completed Eureka!
Completed For the Republic.
Completed No Gods, No Masters.
Caused 10,000 damage with Explosives.
Completed Wild Card.
Completed All or Nothing.
Completed The House Always Wins.
Completed You'll Know It When It Happens.
Discovered all snow globes.
Completed The Legend of the Star.
Completed Volare!
Healed 10,000 points of damage with food.
Reached 30th level.
You Discovered 125 locations.
Picked 50 pockets.
Completed Return to Sender.
Hacked 25 terminals.
Completed Talent Pool.
Recruited all companions.
Installed 20 weapon mods.
Crafted 20 items.
Caused 10,000 damage with Energy Weapons.
Made 50 Speech challenges.
Got banned from all the Strip's casinos.
Reached 20th level.
Completed Ring-a-Ding-Ding.
Won 30 games of Caravan.
Played 10 spins of Roulette.
Discovered 50 locations.
Completed G.I. Blues.
Played 10 spins of Slots.
Sold 10,000 caps worth of goods.
Played 10 hands of Blackjack.
Completed They Went That-a-Way.
Caused 10,000 damage with Guns.
Reached 10th level.
Completed That Lucky Old Sun.
Picked 25 locks.
Completed Come Fly With Me.
Won 3 games of Caravan.
Recruited a companion.
Repaired 30 items.
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.
Completed the Sierra Madre Gala Event.
Recruited Dean Domino, Christine and Dog.
Collected 500 Sierra Madre Chips.
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!
Completed Lonesome Road.
Detonated all of the warheads in the Divide.
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 unique Mojave Wasteland weapons.
Caused 10,000 damage with Gun Runners' Arsenal (GRA) Weapons.