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 All or Nothing.
Completed The House Always Wins.
Completed Veni, Vidi, Vici.
Completed Render Unto Caesar.
Completed Arizona Killer.
Completed Eureka!
Completed For the Republic.
Completed You'll Know It When It Happens.
Hacked 25 terminals.
Reached 30th level.
Completed Talent Pool.
Completed Return to Sender.
Healed 10,000 points of damage with Stimpaks.
You Discovered 125 locations.
Caused 10,000 damage with Explosives.
Completed The Legend of the Star.
Healed 10,000 points of damage with food.
Picked 50 pockets.
Completed Volare!
Caused 10,000 damage with Unarmed weapons.
Played the game from start to finish in Hardcore Mode.
Completed No Gods, No Masters.
Completed Wild Card.
Installed 20 weapon mods.
Recruited all companions.
Won 30 games of Caravan.
Discovered all snow globes.
Caused 10,000 damage with Energy Weapons.
Completed G.I. Blues.
Made 50 Speech challenges.
Reached 20th level.
Got banned from all the Strip's casinos.
Completed Ring-a-Ding-Ding.
Caused 10,000 damage with Guns.
Discovered 50 locations.
Recruited a companion.
Caused 10,000 damage with Melee Weapons.
Played 10 hands of Blackjack.
Played 10 spins of Roulette.
Played 10 spins of Slots.
Completed They Went That-a-Way.
Sold 10,000 caps worth of goods.
Reached 10th level.
Completed That Lucky Old Sun.
Completed Come Fly With Me.
Picked 25 locks.
Crafted 20 items.
Won 3 games of Caravan.
Repaired 30 items.
Completed Ain't That a Kick in the Head.
Recruit Dean Domino, Christine and Dog.
Confront Father Elijah in the Sierra Madre's Vault.
Complete the Sierra Madre Gala Event.
Trap Father Elijah in the Sierra Madre's Vault.
Collect 500 Sierra Madre Chips
Evacuate Zion.
Scout the Zion Valley for signs of the White Legs.
Crush the White Legs.
Arrive at Zion.
Resupply Daniel and the Sorrows.
Recover X-13 cardiac regulator sneaky suit!
Reactivate all of the Sink's robotic assistants.
Make up your mind... about your brain.
Complete Old World Blues.
Recover X-8 vertebrae-pulse-de-sensitizer frequency!
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.