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.
Completed all side missions.
Discovered all named locations.
Allowed a goliath to level up four times before killing him.
Got an item from Michael Mamaril.
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.
Gunzerked continuously for 90 seconds.
Discovered all named locations in Three Horns, Tundra Express, and Frostburn Canyon.
Had Purple-rated gear or better equipped in every slot.
Remained in Zero's Decepti0n mode for ten seconds straight.
Reached level 50.
Completed Round 5 of any Circle of Slaughter.
Killed a flying enemy with a thrown Tediore weapon.
Discovered all named locations in Sanctuary, Opportunity, and Lynchwood.
Phaselocked 100 enemies.
Gave Claptrap a high five.
Killed a Chubby.
Tipped Moxxi $10,000.
Killed Donkey Mong.
Reached level 25.
Killed 100 enemies with the Sabre turret.
Completed 20 side missions.
Purchased 5 items from the black market.
Redeemed 25 tokens.
Killed a Constructor without it ever building another bot.
Reached level 10.
Revived someone from "Fight for Your Life!" that is on your friends list.
Unlocked 10 customization items.
Reached level 5.
Wielded the Mysterious Amulet.
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.
Fed thy noble queen 3 times during one visit to her quarters.
Vanquished the Ancient Dragons of Destruction.
Completed thy quest by rescuing yonder queen.
Unsheathed 5 swords from Immortal Skeletaurs without leaving the area.
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.
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".
Completed all Pirate's Booty side missions.
Discovered all named locations in Oasis and the surrounding Pirate's Booty zones.
Completed the mission "X Marks the Spot".
Defeat the Dark Web.
Defeat Haderax the Invincible.
Complete the mission "Paradise Found".
Allow Tiny Tina to arm the moonshot cannon.
Activate the Backburner's firewall.