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.
Picked 25 locks.
Completed Come Fly With Me.
Caused 10,000 damage with Energy Weapons.
Hacked 25 terminals.
You Discovered 125 locations.
Reached 30th level.
Made 50 Speech challenges.
Completed G.I. Blues.
Reached 20th level.
Completed Volare!
Discovered 50 locations.
Sold 10,000 caps worth of goods.
Caused 10,000 damage with Guns.
Completed No Gods, No Masters.
Completed Wild Card.
Played 10 spins of Slots.
Reached 10th level.
Completed Ring-a-Ding-Ding.
Completed They Went That-a-Way.
Completed That Lucky Old Sun.
Recruited a companion.
Repaired 30 items.
Crafted 20 items.
Completed Ain't That a Kick in the Head.
Recruit all companions.
Install 20 weapon mods.
Discover all snow globes.
Cause 10,000 damage with Explosives.
Heal 10,000 points of damage with Stimpaks.
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 Roulette.
Play 10 hands of Blackjack.
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 For the Republic.
Complete Render Unto Caesar.
Complete All or Nothing.
Complete Veni, Vidi, Vici.
Complete Eureka!
Complete Talent Pool.
Complete Return to Sender.
Complete Arizona Killer.
Complete You'll Know It When It Happens.
Complete The Legend of the Star.
Completed the Sierra Madre Gala Event.
Collected 500 Sierra Madre Chips.
Recruited Dean Domino, Christine and Dog.
Confront Father Elijah in the Sierra Madre's Vault.
Trap Father Elijah in the Sierra Madre's Vault.
Evacuated Zion.
Scouted the Zion Valley for signs of the White Legs.
Resupplied Daniel and the Sorrows.
Arrived at Zion.
Crush the White Legs.
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!
Reactivate all of the Sink's robotic assistants.
Find all of ED-E's upgrades in the Divide.
Decide the fate of all the Divide dwellers.
Complete Lonesome Road.
Acquire all upgrades for the Divide's signature weapon.
Detonate all of the warheads in the Divide.
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.