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.
Got banned from all the Strip's casinos.
Hacked 25 terminals.
Healed 10,000 points of damage with food.
Picked 50 pockets.
Healed 10,000 points of damage with Stimpaks.
Won 30 games of Caravan.
Won 3 games of Caravan.
Completed No Gods, No Masters.
Completed Wild Card.
Completed Return to Sender.
Completed Eureka!
Caused 10,000 damage with Explosives.
Completed For the Republic.
Completed Talent Pool.
Recruited all companions.
Completed You'll Know It When It Happens.
Discovered all snow globes.
Caused 10,000 damage with Energy Weapons.
Caused 10,000 damage with Unarmed weapons.
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.
Completed Volare!
Completed The Legend of the Star.
Installed 20 weapon mods.
Played 10 spins of Roulette.
Played 10 spins of Slots.
Played 10 hands of Blackjack.
Reached 30th level.
Made 50 Speech challenges.
Completed G.I. Blues.
You Discovered 125 locations.
Caused 10,000 damage with Melee Weapons.
Sold 10,000 caps worth of goods.
Reached 20th level.
Completed Ring-a-Ding-Ding.
Picked 25 locks.
Caused 10,000 damage with Guns.
Discovered 50 locations.
Completed Come Fly With Me.
Reached 10th level.
Completed That Lucky Old Sun.
Completed They Went That-a-Way.
Repaired 30 items.
Recruited a companion.
Crafted 20 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.
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.
Reactivated all of the Sink's robotic assistants.
Recovered X-13 cardiac regulator sneaky suit!
Recovered X-8 vertebrae-pulse-de-sensitizer frequency!
Found all of ED-E's upgrades in the Divide.
Detonated all of the warheads in the Divide.
Completed Lonesome Road.
Acquired all upgrades for the Divide's signature weapon.
Decided the fate of all the Divide dwellers.
Completed any three Gun Runners' Arsenal (GRA) three star (***) Challenges.
Completed any three Gun Runners' Arsenal (GRA) one star (*) Challenges.
Completed any three Gun Runners' Arsenal (GRA) two star (**) Challenges.
Caused 10,000 damage with unique Mojave Wasteland weapons.
Caused 10,000 damage with Gun Runners' Arsenal (GRA) Weapons.