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