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.
Remained in Zero's Decepti0n mode for ten seconds straight.
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.
Phaselocked 100 enemies.
Completed Round 5 of any Circle of Slaughter.
Killed Donkey Mong.
Got an item from Michael Mamaril.
Discovered all named locations in Sanctuary, Opportunity, and Lynchwood.
Killed 100 enemies with the Sabre turret.
Gunzerked continuously for 90 seconds.
Reached level 50.
Allowed a goliath to level up four times before killing him.
Had Purple-rated gear or better equipped in every slot.
Killed a flying enemy with a thrown Tediore weapon.
Gave Claptrap a high five.
Reached level 25.
Killed a Constructor without it ever building another bot.
Tipped Moxxi $10,000.
Completed 20 side missions.
Purchased 5 items from the black market.
Redeemed 25 tokens.
Killed a Chubby.
Unlocked 10 customization items.
Reached level 10.
Revived someone from "Fight for Your Life!" that is on your friends list.
Reached level 5.
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.
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.
Demonstrated your skill, or lack thereof, at rolling the magical treasure orb of many sides.
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".
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 Haderax the Invincible.
Defeat the Dark Web.
Allow Tiny Tina to arm the moonshot cannon.
Complete the mission "Paradise Found".
Activate the Backburner's firewall.