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