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