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.
Completed all side missions.
Had Purple-rated gear or better equipped in every slot.
Discovered all named locations in Eridium Blight, Arid Nexus, and Sawtooth Cauldron.
Killed Donkey Mong.
Killed a flying enemy with a thrown Tediore weapon.
Discovered all named locations in Three Horns, Tundra Express, and Frostburn Canyon.
Phaselocked 100 enemies.
Reached level 50.
Discovered all named locations in The Highlands, Thousand Cuts, and Wildlife Exploitation Preserve.
Killed a Chubby.
Got an item from Michael Mamaril.
Completed Round 5 of any Circle of Slaughter.
Discovered all named locations in Sanctuary, Opportunity, and Lynchwood.
Gave Claptrap a high five.
Reached level 25.
Tipped Moxxi $10,000.
Killed a Constructor without it ever building another bot.
Redeemed 25 tokens.
Purchased 5 items from the black market.
Completed 20 side missions.
Reached level 10.
Revived someone from "Fight for Your Life!" that is on your friends list.
Unlocked 10 customization items.
Reached level 5.
Completed level 1 of all non-level-specific challenges with a single character.
Allowed a goliath to level up four times before killing him.
Discovered all named locations.
Killed 100 enemies with the Sabre turret.
Gunzerked continuously for 90 seconds.
Remained in Zero's Decepti0n mode for ten seconds straight.
Wielded the Mysterious Amulet.
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.
Vanquished the Ancient Dragons of Destruction.
Won the most challenging round in Murderlin's Temple.
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.
Slew Mister Boney Pants Guy.
Introduced thyself to the White Knight.
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 all Campaign of Carnage side missions.
Completed the mission "Long Way To The Top".
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".
Allow Tiny Tina to arm the moonshot cannon.
Activate the Backburner's firewall.
Defeat Haderax the Invincible.
Defeat the Dark Web.
Complete the mission "Paradise Found".