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.
Recruited a companion.
Crafted 20 items.
Discovered 50 locations.
Repaired 30 items.
Won 3 games of Caravan.
Completed Ain't That a Kick in the Head.
Completed Come Fly With Me.
Caused 10,000 damage with Unarmed weapons.
Caused 10,000 damage with Melee Weapons.
Healed 10,000 points of damage with Stimpaks.
You Discovered 125 locations.
Installed 20 weapon mods.
Completed No Gods, No Masters.
Completed Wild Card.
Completed Eureka!
Completed For the Republic.
Completed You'll Know It When It Happens.
Completed Volare!
Reached 30th level.
Played 10 spins of Roulette.
Hacked 25 terminals.
Completed Ring-a-Ding-Ding.
Completed G.I. Blues.
Played 10 hands of Blackjack.
Played 10 spins of Slots.
Made 50 Speech challenges.
Reached 20th level.
Picked 25 locks.
Completed Return to Sender.
Sold 10,000 caps worth of goods.
Caused 10,000 damage with Guns.
Reached 10th level.
Completed They Went That-a-Way.
Completed That Lucky Old Sun.
Recruit all companions.
Discover all snow globes.
Cause 10,000 damage with Energy Weapons.
Cause 10,000 damage with Explosives.
Pick 50 pockets.
Heal 10,000 points of damage with food.
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 All or Nothing.
Complete Veni, Vidi, Vici.
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.
Recruited Dean Domino, Christine and Dog.
Collected 500 Sierra Madre Chips.
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.
Reactivated all of the Sink's robotic assistants.
Recovered X-8 vertebrae-pulse-de-sensitizer frequency!
Recovered X-13 cardiac regulator sneaky suit!
Acquired all upgrades for the Divide's signature weapon.
Completed Lonesome Road.
Decided the fate of all the Divide dwellers.
Find all of ED-E's upgrades in the Divide.
Detonate all of the warheads in the Divide.
Caused 10,000 damage with Gun Runners' Arsenal (GRA) Weapons.
Cause 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.