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.
Reached 10th level.
Recruited a companion.
Discovered 50 locations.
Completed They Went That-a-Way.
Crafted 20 items.
Sold 10,000 caps worth of goods.
Reached 20th level.
Reached 30th level.
Completed That Lucky Old Sun.
Healed 10,000 points of damage with Stimpaks.
Installed 20 weapon mods.
Picked 25 locks.
Played the game from start to finish in Hardcore Mode.
Completed All or Nothing.
Completed The House Always Wins.
Hacked 25 terminals.
Caused 10,000 damage with Explosives.
Won 30 games of Caravan.
Won 3 games of Caravan.
Got banned from all the Strip's casinos.
Completed Veni, Vidi, Vici.
Caused 10,000 damage with Unarmed weapons.
Completed Render Unto Caesar.
Completed Arizona Killer.
Caused 10,000 damage with Melee Weapons.
Healed 10,000 points of damage with food.
Completed Eureka!
Completed The Legend of the Star.
Recruited all companions.
Completed For the Republic.
Caused 10,000 damage with Energy Weapons.
Picked 50 pockets.
You Discovered 125 locations.
Completed Return to Sender.
Completed You'll Know It When It Happens.
Repaired 30 items.
Completed No Gods, No Masters.
Made 50 Speech challenges.
Discovered all snow globes.
Completed Wild Card.
Played 10 hands of Blackjack.
Played 10 spins of Slots.
Played 10 spins of Roulette.
Completed G.I. Blues.
Completed Volare!
Caused 10,000 damage with Guns.
Completed Talent Pool.
Completed Ring-a-Ding-Ding.
Completed Come Fly With Me.
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.
Collected 500 Sierra Madre Chips.
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.
Reactivated all of the Sink's robotic assistants.
Completed Old World Blues.
Made up your mind... about your brain.
Recovered X-8 vertebrae-pulse-de-sensitizer frequency!
Recovered X-13 cardiac regulator sneaky suit!
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.
Completed Lonesome Road.
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 Gun Runners' Arsenal (GRA) Weapons.
Caused 10,000 damage with unique Mojave Wasteland weapons.