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