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.
Completed Veni, Vidi, Vici.
Completed Render Unto Caesar.
Completed Arizona Killer.
Completed All or Nothing.
Completed The House Always Wins.
You Discovered 125 locations.
Hacked 25 terminals.
Got banned from all the Strip's casinos.
Caused 10,000 damage with Explosives.
Caused 10,000 damage with Unarmed weapons.
Caused 10,000 damage with Melee Weapons.
Completed Eureka!
Completed For the Republic.
Healed 10,000 points of damage with food.
Healed 10,000 points of damage with Stimpaks.
Reached 30th level.
Completed The Legend of the Star.
Caused 10,000 damage with Energy Weapons.
Completed No Gods, No Masters.
Completed Wild Card.
Completed You'll Know It When It Happens.
Reached 20th level.
Made 50 Speech challenges.
Completed Return to Sender.
Caused 10,000 damage with Guns.
Completed Talent Pool.
Picked 50 pockets.
Completed That Lucky Old Sun.
Completed G.I. Blues.
Picked 25 locks.
Discovered all snow globes.
Completed Volare!
Discovered 50 locations.
Recruited all companions.
Won 30 games of Caravan.
Installed 20 weapon mods.
Reached 10th level.
Recruited a companion.
Won 3 games of Caravan.
Completed Ring-a-Ding-Ding.
Sold 10,000 caps worth of goods.
Played 10 spins of Slots.
Played 10 spins of Roulette.
Played 10 hands of Blackjack.
Completed They Went That-a-Way.
Completed Come Fly With Me.
Repaired 30 items.
Crafted 20 items.
Completed Ain't That a Kick in the Head.
Confronted Father Elijah in the Sierra Madre's Vault.
Trapped 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.
Reactivated all of the Sink's robotic assistants.
Recovered X-8 vertebrae-pulse-de-sensitizer frequency!
Recovered X-13 cardiac regulator sneaky suit!
Completed Lonesome Road.
Detonated all of the warheads in the Divide.
Found all of ED-E's upgrades in the Divide.
Acquired all upgrades for the Divide's signature weapon.
Decided the fate of all the Divide dwellers.
Caused 10,000 damage with unique Mojave Wasteland weapons.
Caused 10,000 damage with Gun Runners' Arsenal (GRA) Weapons.
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.