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 Melee Weapons.
Healed 10,000 points of damage with Stimpaks.
Hacked 25 terminals.
Recruited all companions.
You Discovered 125 locations.
Completed Eureka!
Reached 30th level.
Completed For the Republic.
Completed You'll Know It When It Happens.
Caused 10,000 damage with Guns.
Played 10 spins of Roulette.
Played 10 spins of Slots.
Caused 10,000 damage with Energy Weapons.
Completed Return to Sender.
Made 50 Speech challenges.
Reached 20th level.
Completed Ring-a-Ding-Ding.
Played 10 hands of Blackjack.
Picked 25 locks.
Sold 10,000 caps worth of goods.
Completed That Lucky Old Sun.
Completed Volare!
Discovered 50 locations.
Repaired 30 items.
Completed G.I. Blues.
Won 3 games of Caravan.
Reached 10th level.
Completed They Went That-a-Way.
Completed Come Fly With Me.
Recruited a companion.
Crafted 20 items.
Completed Ain't That a Kick in the Head.
Install 20 weapon mods.
Discover all snow globes.
Cause 10,000 damage with Explosives.
Pick 50 pockets.
Heal 10,000 points of damage with food.
Cause 10,000 damage with Unarmed weapons.
Win 30 games of Caravan.
Get banned from all the Strip's casinos.
Play the game from start to finish in Hardcore Mode.
Complete The House Always Wins.
Complete Render Unto Caesar.
Complete Wild Card.
Complete All or Nothing.
Complete Veni, Vidi, Vici.
Complete No Gods, No Masters.
Complete Talent Pool.
Complete Arizona Killer.
Complete The Legend of the Star.
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.
Scouted the Zion Valley for signs of the White Legs.
Resupplied Daniel and the Sorrows.
Arrived at Zion.
Evacuate Zion.
Completed Old World Blues.
Made up your mind... about your brain.
Recovered X-13 cardiac regulator sneaky suit!
Reactivated all of the Sink's robotic assistants.
Recovered X-8 vertebrae-pulse-de-sensitizer frequency!
Completed Lonesome Road.
Decided the fate of all the Divide dwellers.
Find all of ED-E's upgrades in the Divide.
Acquire all upgrades for the Divide's signature weapon.
Detonate all of the warheads in the Divide.
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) two star (**) Challenges.
Complete any three Gun Runners' Arsenal (GRA) three star (***) Challenges.