Full list of all 75 Borderlands 2 achievements. It takes around 150-200 hours to unlock all of the achievements in the base game on Windows.
The base game contains 50 achievements, and there are 5 DLC packs containing 25 achievements.
Reached level 50.
Discovered all named locations in Eridium Blight, Arid Nexus, and Sawtooth Cauldron.
Discovered all named locations.
Discovered all named locations in The Highlands, Thousand Cuts, and Wildlife Exploitation Preserve.
Discovered all named locations in Three Horns, Tundra Express, and Frostburn Canyon.
Completed all side missions.
Killed a Chubby.
Killed a flying enemy with a thrown Tediore weapon.
Completed Round 5 of any Circle of Slaughter.
Had Purple-rated gear or better equipped in every slot.
Revived someone from "Fight for Your Life!" that is on your friends list.
Killed Donkey Mong.
Tipped Moxxi $10,000.
Discovered all named locations in Sanctuary, Opportunity, and Lynchwood.
Allowed a goliath to level up four times before killing him.
Gave Claptrap a high five.
Reached level 25.
Killed a Constructor without it ever building another bot.
Purchased 5 items from the black market.
Completed 20 side missions.
Redeemed 25 tokens.
Phaselocked 100 enemies.
Reached level 10.
Unlocked 10 customization items.
Reached level 5.
Completed level 1 of all non-level-specific challenges with a single character.
Killed 100 enemies with the Sabre turret.
Gunzerked continuously for 90 seconds.
Got an item from Michael Mamaril.
Remained in Zero's Decepti0n mode for ten seconds straight.
Wielded the Mysterious Amulet.
Vanquished the Ancient Dragons of Destruction.
Fed thy noble queen 3 times during one visit to her quarters.
Completed thy quest by rescuing yonder queen.
Unsheathed 5 swords from Immortal Skeletaurs without leaving the area.
Showed thine worst enemy, the abomination known as "The Darkness", who is the nerdiest of them all.
Introduced thyself to the White Knight.
Demonstrated your skill, or lack thereof, at rolling the magical treasure orb of many sides.
Slew Mister Boney Pants Guy.
Won the most challenging round in Murderlin's Temple.
Completed all Hammerlock's Hunt side missions.
Discovered all named locations in Hammerlock's Hunt.
Completed the mission "The Fall of Nakayama".
Collected 10 pictures of Moxxi in Campaign of Carnage.
Completed the mission "Long Way To The Top".
Completed all Campaign of Carnage side missions.
Discovered all named locations in Oasis and the surrounding Pirate's Booty zones.
Completed all Pirate's Booty side missions.
Completed the mission "X Marks the Spot".
Activate the Backburner's firewall.
Allow Tiny Tina to arm the moonshot cannon.
Defeat Haderax the Invincible.
Defeat the Dark Web.
Complete the mission "Paradise Found".