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.
Repaired 30 items.
Completed Volare!
Installed 20 weapon mods.
Completed Eureka!
Completed For the Republic.
Hacked 25 terminals.
Caused 10,000 damage with Energy Weapons.
You Discovered 125 locations.
Healed 10,000 points of damage with Stimpaks.
Reached 30th level.
Discovered all snow globes.
Completed Return to Sender.
Recruited all companions.
Completed Talent Pool.
Played the game from start to finish in Hardcore Mode.
Completed Veni, Vidi, Vici.
Completed Render Unto Caesar.
Completed Arizona Killer.
Completed All or Nothing.
Completed The House Always Wins.
Completed No Gods, No Masters.
Completed Wild Card.
Completed You'll Know It When It Happens.
Completed That Lucky Old Sun.
Discovered 50 locations.
Made 50 Speech challenges.
Reached 20th level.
Completed Ring-a-Ding-Ding.
Sold 10,000 caps worth of goods.
Completed G.I. Blues.
Completed Come Fly With Me.
Caused 10,000 damage with Guns.
Completed They Went That-a-Way.
Picked 25 locks.
Crafted 20 items.
Reached 10th level.
Recruited a companion.
Completed Ain't That a Kick in the Head.
Cause 10,000 damage with Explosives.
Cause 10,000 damage with Melee Weapons.
Pick 50 pockets.
Heal 10,000 points of damage with food.
Cause 10,000 damage with Unarmed weapons.
Win 3 games of Caravan.
Play 10 spins of Slots.
Play 10 spins of Roulette.
Play 10 hands of Blackjack.
Win 30 games of Caravan.
Get banned from all the Strip's casinos.
Complete The Legend of the Star.
Trapped Father Elijah in the Sierra Madre's Vault.
Collected 500 Sierra Madre Chips.
Completed the Sierra Madre Gala Event.
Recruited Dean Domino, Christine and Dog.
Confront Father Elijah in the Sierra Madre's Vault.
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!
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.