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.
Caused 10,000 damage with Guns.
Picked 25 locks.
Repaired 30 items.
Played 10 spins of Roulette.
Played 10 hands of Blackjack.
Completed Come Fly With Me.
Completed Return to Sender.
Completed That Lucky Old Sun.
Reached 20th level.
Crafted 20 items.
Sold 10,000 caps worth of goods.
Made 50 Speech challenges.
Played 10 spins of Slots.
Completed They Went That-a-Way.
Completed Ring-a-Ding-Ding.
Completed The House Always Wins.
Completed Talent Pool.
Completed You'll Know It When It Happens.
Completed G.I. Blues.
Completed Volare!
Healed 10,000 points of damage with Stimpaks.
Caused 10,000 damage with Unarmed weapons.
Got banned from all the Strip's casinos.
Completed All or Nothing.
Completed No Gods, No Masters.
Completed The Legend of the Star.
Picked 50 pockets.
Won 30 games of Caravan.
Won 3 games of Caravan.
Healed 10,000 points of damage with food.
Caused 10,000 damage with Explosives.
Installed 20 weapon mods.
You Discovered 125 locations.
Hacked 25 terminals.
Reached 30th level.
Caused 10,000 damage with Energy Weapons.
Recruited all companions.
Played the game from start to finish in Hardcore Mode.
Completed Veni, Vidi, Vici.
Completed Render Unto Caesar.
Completed Arizona Killer.
Discovered all snow globes.
Completed Wild Card.
Caused 10,000 damage with Melee Weapons.
Completed Ain't That a Kick in the Head.
Complete For the Republic.
Complete Eureka!
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.
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-8 vertebrae-pulse-de-sensitizer frequency!
Recovered X-13 cardiac regulator sneaky suit!
Reactivated all of the Sink's robotic assistants.
Detonated all of the warheads in the Divide.
Completed Lonesome Road.
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 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.