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.
Caused 10,000 damage with Explosives.
Completed Eureka!
Completed Volare!
Completed The Legend of the Star.
Completed No Gods, No Masters.
Completed Wild Card.
Completed Veni, Vidi, Vici.
Completed Render Unto Caesar.
Completed Arizona Killer.
Caused 10,000 damage with Melee Weapons.
Played 10 hands of Blackjack.
Played 10 spins of Roulette.
Hacked 25 terminals.
Completed All or Nothing.
Completed The House Always Wins.
Completed For the Republic.
Completed You'll Know It When It Happens.
Completed G.I. Blues.
Installed 20 weapon mods.
Recruited all companions.
Made 50 Speech challenges.
Reached 30th level.
Completed Return to Sender.
You Discovered 125 locations.
Caused 10,000 damage with Energy Weapons.
Completed That Lucky Old Sun.
Reached 20th level.
Healed 10,000 points of damage with Stimpaks.
Discovered all snow globes.
Picked 25 locks.
Discovered 50 locations.
Caused 10,000 damage with Guns.
Played 10 spins of Slots.
Reached 10th level.
Completed Ring-a-Ding-Ding.
Sold 10,000 caps worth of goods.
Completed They Went That-a-Way.
Recruited a companion.
Completed Come Fly With Me.
Repaired 30 items.
Crafted 20 items.
Completed Ain't That a Kick in the Head.
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 Talent Pool.
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.
Trap Father Elijah in the Sierra Madre's Vault.
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.
Reactivated all of the Sink's robotic assistants.
Recovered X-8 vertebrae-pulse-de-sensitizer frequency!
Recovered X-13 cardiac regulator sneaky suit!
Completed Lonesome Road.
Acquired all upgrades for the Divide's signature weapon.
Found all of ED-E's upgrades in the Divide.
Decided the fate of all the Divide dwellers.
Detonate all of the warheads in the Divide.
Caused 10,000 damage with Gun Runners' Arsenal (GRA) Weapons.
Cause 10,000 damage with unique Mojave Wasteland 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.