Full list of all 75 Borderlands 2 achievements. It takes around 80-100 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.
Allowed a goliath to level up four times before killing him.
Got an item from Michael Mamaril.
Completed level 1 of all non-level-specific challenges with a single character.
Killed Donkey Mong.
Gave Claptrap a high five.
Discovered all named locations in Three Horns, Tundra Express, and Frostburn Canyon.
Discovered all named locations in Sanctuary, Opportunity, and Lynchwood.
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.
Discovered all named locations.
Killed a Chubby.
Reached level 25.
Reached level 50.
Killed 100 enemies with the Sabre turret.
Completed Round 5 of any Circle of Slaughter.
Killed a Constructor without it ever building another bot.
Phaselocked 100 enemies.
Tipped Moxxi $10,000.
Revived someone from "Fight for Your Life!" that is on your friends list.
Purchased 5 items from the black market.
Remained in Zero's Decepti0n mode for ten seconds straight.
Reached level 10.
Reached level 5.
Gunzerked continuously for 90 seconds.
Had Purple-rated gear or better equipped in every slot.
Completed 20 side missions.
Redeemed 25 tokens.
Unlocked 10 customization items.
Killed a flying enemy with a thrown Tediore weapon.
Completed all side missions.
Won the most challenging round in Murderlin's Temple.
Vanquished the Ancient Dragons of Destruction.
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.
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.
Wielded the Mysterious Amulet.
Completed the mission "The Fall of Nakayama".
Completed all Hammerlock's Hunt side missions.
Discovered all named locations in Hammerlock's Hunt.
Collected 10 pictures of Moxxi in Campaign of Carnage.
Completed all Campaign of Carnage side missions.
Completed the mission "Long Way To The Top".
Completed the mission "X Marks the Spot".
Discovered all named locations in Oasis and the surrounding Pirate's Booty zones.
Completed all Pirate's Booty side missions.
Complete the mission "Paradise Found".
Allow Tiny Tina to arm the moonshot cannon.
Activate the Backburner's firewall.
Defeat Haderax the Invincible.
Defeat the Dark Web.