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.
Picked 50 pockets.
Caused 10,000 damage with Unarmed weapons.
Hacked 25 terminals.
Completed The Legend of the Star.
Healed 10,000 points of damage with food.
Repaired 30 items.
Recruited all companions.
Discovered all snow globes.
Completed Veni, Vidi, Vici.
Completed Render Unto Caesar.
Reached 30th level.
Completed Arizona Killer.
Completed G.I. Blues.
Completed All or Nothing.
Completed The House Always Wins.
Installed 20 weapon mods.
Caused 10,000 damage with Explosives.
Caused 10,000 damage with Energy Weapons.
Played the game from start to finish in Hardcore Mode.
Completed No Gods, No Masters.
Healed 10,000 points of damage with Stimpaks.
Completed Wild Card.
Recruited a companion.
Made 50 Speech challenges.
Completed Return to Sender.
You Discovered 125 locations.
Completed Talent Pool.
Completed Volare!
Sold 10,000 caps worth of goods.
Completed That Lucky Old Sun.
Reached 20th level.
Caused 10,000 damage with Guns.
Played 10 spins of Roulette.
Played 10 hands of Blackjack.
Caused 10,000 damage with Melee Weapons.
Picked 25 locks.
Played 10 spins of Slots.
Completed Ring-a-Ding-Ding.
Discovered 50 locations.
Completed They Went That-a-Way.
Reached 10th level.
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.
Get banned from all the Strip's casinos.
Complete For the Republic.
Complete Eureka!
Complete You'll Know It When It Happens.
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.
Evacuated Zion.
Crushed the White Legs.
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-13 cardiac regulator sneaky suit!
Recovered X-8 vertebrae-pulse-de-sensitizer frequency!
Acquired all upgrades for the Divide's signature weapon.
Found all of ED-E's upgrades in the Divide.
Detonated all of the warheads in the Divide.
Completed Lonesome Road.
Decided the fate of all the Divide dwellers.
Completed any three Gun Runners' Arsenal (GRA) two star (**) Challenges.
Caused 10,000 damage with Gun Runners' Arsenal (GRA) Weapons.
Caused 10,000 damage with unique Mojave Wasteland weapons.
Complete any three Gun Runners' Arsenal (GRA) one star (*) Challenges.
Complete any three Gun Runners' Arsenal (GRA) three star (***) Challenges.