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.
Gunzerked continuously for 90 seconds.
Completed level 1 of all non-level-specific challenges with a single character.
Allowed a goliath to level up four times before killing him.
Killed 100 enemies with the Sabre turret.
Remained in Zero's Decepti0n mode for ten seconds straight.
Completed all side missions.
Completed Round 5 of any Circle of Slaughter.
Discovered all named locations in The Highlands, Thousand Cuts, and Wildlife Exploitation Preserve.
Discovered all named locations.
Discovered all named locations in Three Horns, Tundra Express, and Frostburn Canyon.
Got an item from Michael Mamaril.
Killed a Chubby.
Discovered all named locations in Eridium Blight, Arid Nexus, and Sawtooth Cauldron.
Killed Donkey Mong.
Killed a flying enemy with a thrown Tediore weapon.
Had Purple-rated gear or better equipped in every slot.
Reached level 50.
Discovered all named locations in Sanctuary, Opportunity, and Lynchwood.
Tipped Moxxi $10,000.
Reached level 25.
Gave Claptrap a high five.
Phaselocked 100 enemies.
Completed 20 side missions.
Purchased 5 items from the black market.
Killed a Constructor without it ever building another bot.
Redeemed 25 tokens.
Unlocked 10 customization items.
Reached level 10.
Reached level 5.
Revived someone from "Fight for Your Life!" that is on your friends list.
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.
Vanquished the Ancient Dragons of Destruction.
Fed thy noble queen 3 times during one visit to her quarters.
Demonstrated your skill, or lack thereof, at rolling the magical treasure orb of many sides.
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".
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.