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