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 50 pockets.
Installed 20 weapon mods.
Healed 10,000 points of damage with food.
Hacked 25 terminals.
Caused 10,000 damage with Explosives.
Completed The Legend of the Star.
Healed 10,000 points of damage with Stimpaks.
Caused 10,000 damage with Melee Weapons.
Caused 10,000 damage with Unarmed weapons.
You Discovered 125 locations.
Sold 10,000 caps worth of goods.
Completed Eureka!
Completed For the Republic.
Completed Veni, Vidi, Vici.
Completed Render Unto Caesar.
Completed Arizona Killer.
Completed No Gods, No Masters.
Completed Wild Card.
Completed All or Nothing.
Completed The House Always Wins.
Completed You'll Know It When It Happens.
Discovered all snow globes.
Reached 30th level.
Caused 10,000 damage with Guns.
Recruited all companions.
Completed Volare!
Completed G.I. Blues.
Played 10 spins of Roulette.
Played 10 hands of Blackjack.
Completed Talent Pool.
Made 50 Speech challenges.
Completed Ring-a-Ding-Ding.
Caused 10,000 damage with Energy Weapons.
Completed They Went That-a-Way.
Completed Return to Sender.
Reached 20th level.
Discovered 50 locations.
Played 10 spins of Slots.
Picked 25 locks.
Completed Come Fly With Me.
Reached 10th level.
Completed That Lucky Old Sun.
Crafted 20 items.
Recruited a companion.
Repaired 30 items.
Completed Ain't That a Kick in the Head.
Win 3 games of Caravan.
Win 30 games of Caravan.
Get banned from all the Strip's casinos.
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.
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-8 vertebrae-pulse-de-sensitizer frequency!
Reactivated all of the Sink's robotic assistants.
Recovered X-13 cardiac regulator sneaky suit!
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.