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 Ain't That a Kick in the Head.
Recruited a companion.
Completed They Went That-a-Way.
Completed Ring-a-Ding-Ding.
Completed Wild Card.
Made 50 Speech challenges.
Played the game from start to finish in Hardcore Mode.
Completed No Gods, No Masters.
Reached 10th level.
Completed That Lucky Old Sun.
Crafted 20 items.
Repaired 30 items.
Discovered 50 locations.
Sold 10,000 caps worth of goods.
Won 3 games of Caravan.
Discovered all snow globes.
Caused 10,000 damage with Guns.
Completed Volare!
Reached 20th level.
Caused 10,000 damage with Explosives.
Played 10 spins of Slots.
Played 10 spins of Roulette.
Played 10 hands of Blackjack.
Picked 25 locks.
Healed 10,000 points of damage with Stimpaks.
Completed Arizona Killer.
Completed Render Unto Caesar.
Completed Veni, Vidi, Vici.
Completed The House Always Wins.
Completed All or Nothing.
Completed Talent Pool.
Completed G.I. Blues.
Recruited all companions.
Installed 20 weapon mods.
Completed Come Fly With Me.
Reached 30th level.
Caused 10,000 damage with Energy Weapons.
Completed You'll Know It When It Happens.
You Discovered 125 locations.
Completed For the Republic.
Completed Eureka!
Healed 10,000 points of damage with food.
Completed Return to Sender.
Caused 10,000 damage with Melee Weapons.
Hacked 25 terminals.
Caused 10,000 damage with Unarmed weapons.
Won 30 games of Caravan.
Got banned from all the Strip's casinos.
Completed The Legend of the Star.
Picked 50 pockets.
Recruited Dean Domino, Christine and Dog.
Confronted Father Elijah in the Sierra Madre's Vault.
Completed the Sierra Madre Gala Event.
Trapped Father Elijah in the Sierra Madre's Vault.
Collected 500 Sierra Madre Chips.
Evacuated Zion.
Scouted the Zion Valley for signs of the White Legs.
Crushed the White Legs.
Arrived at Zion.
Resupplied Daniel and the Sorrows.
Recovered X-13 cardiac regulator sneaky suit!
Reactivated all of the Sink's robotic assistants.
Made up your mind... about your brain.
Recovered X-8 vertebrae-pulse-de-sensitizer frequency!
Completed Old World Blues.
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 Lonesome Road.
Detonated all of the warheads in the Divide.
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) one star (*) Challenges.
Completed any three Gun Runners' Arsenal (GRA) two star (**) Challenges.
Completed any three Gun Runners' Arsenal (GRA) three star (***) Challenges.