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