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.
Crafted 20 items.
Discovered 50 locations.
Caused 10,000 damage with Explosives.
Picked 25 locks.
Caused 10,000 damage with Melee Weapons.
Completed Come Fly With Me.
Repaired 30 items.
Healed 10,000 points of damage with Stimpaks.
Caused 10,000 damage with Energy Weapons.
Completed The Legend of the Star.
Completed All or Nothing.
Completed No Gods, No Masters.
Completed Eureka!
Completed For the Republic.
Completed You'll Know It When It Happens.
Hacked 25 terminals.
Caused 10,000 damage with Unarmed weapons.
Completed Return to Sender.
Reached 30th level.
Installed 20 weapon mods.
Recruited all companions.
Discovered all snow globes.
You Discovered 125 locations.
Completed Talent Pool.
Played 10 spins of Roulette.
Played 10 hands of Blackjack.
Played 10 spins of Slots.
Completed Veni, Vidi, Vici.
Completed Render Unto Caesar.
Completed Arizona Killer.
Completed Wild Card.
Completed The House Always Wins.
Completed Volare!
Made 50 Speech challenges.
Caused 10,000 damage with Guns.
Completed That Lucky Old Sun.
Completed Ring-a-Ding-Ding.
Reached 20th level.
Recruited a companion.
Sold 10,000 caps worth of goods.
Completed G.I. Blues.
Completed They Went That-a-Way.
Reached 10th level.
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.
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.
Collected 500 Sierra Madre Chips.
Recruited Dean Domino, Christine and Dog.
Arrived at Zion.
Resupplied Daniel and the Sorrows.
Crushed the White Legs.
Evacuated Zion.
Scouted the Zion Valley for signs of the White Legs.
Recovered X-8 vertebrae-pulse-de-sensitizer frequency!
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.
Detonated all of the warheads in the Divide.
Completed Lonesome Road.
Found all of ED-E's upgrades in the Divide.
Acquired all upgrades for the Divide's signature weapon.
Decided the fate of all the Divide dwellers.
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.