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