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