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