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