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.
Completed The Legend of the Star.
Installed 20 weapon mods.
Completed Eureka!
Completed For the Republic.
Completed Return to Sender.
Completed You'll Know It When It Happens.
Healed 10,000 points of damage with Stimpaks.
Discovered all snow globes.
Hacked 25 terminals.
Caused 10,000 damage with Explosives.
Caused 10,000 damage with Unarmed weapons.
Reached 30th level.
Recruited all companions.
Caused 10,000 damage with Melee Weapons.
Completed G.I. Blues.
Completed Veni, Vidi, Vici.
Completed Render Unto Caesar.
Completed Arizona Killer.
Completed No Gods, No Masters.
Completed Wild Card.
Played the game from start to finish in Hardcore Mode.
Completed All or Nothing.
Completed The House Always Wins.
You Discovered 125 locations.
Sold 10,000 caps worth of goods.
Caused 10,000 damage with Guns.
Caused 10,000 damage with Energy Weapons.
Made 50 Speech challenges.
Completed Volare!
Reached 20th level.
Completed That Lucky Old Sun.
Played 10 hands of Blackjack.
Played 10 spins of Roulette.
Played 10 spins of Slots.
Completed Talent Pool.
Completed Ring-a-Ding-Ding.
Picked 25 locks.
Discovered 50 locations.
Recruited a companion.
Reached 10th level.
Completed They Went That-a-Way.
Completed Come Fly With Me.
Repaired 30 items.
Crafted 20 items.
Completed Ain't That a Kick in the Head.
Heal 10,000 points of damage with food.
Win 3 games of Caravan.
Win 30 games of Caravan.
Get banned from all the Strip's casinos.
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.
Evacuated Zion.
Crushed the White Legs.
Scouted the Zion Valley for signs of the White Legs.
Resupplied Daniel and the Sorrows.
Arrived at Zion.
Reactivated all of the Sink's robotic assistants.
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!
Acquired all upgrades for the Divide's signature weapon.
Found all of ED-E's upgrades in the Divide.
Completed Lonesome Road.
Decided the fate of all the Divide dwellers.
Detonate all of the warheads in the Divide.
Caused 10,000 damage with unique Mojave Wasteland weapons.
Completed any three Gun Runners' Arsenal (GRA) three star (***) Challenges.
Completed any three Gun Runners' Arsenal (GRA) two star (**) Challenges.
Caused 10,000 damage with Gun Runners' Arsenal (GRA) Weapons.
Completed any three Gun Runners' Arsenal (GRA) one star (*) Challenges.