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.
Allowed a goliath to level up four times before killing him.
Killed Donkey Mong.
Had Purple-rated gear or better equipped in every slot.
Killed a flying enemy with a thrown Tediore weapon.
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.
Completed Round 5 of any Circle of Slaughter.
Revived someone from "Fight for Your Life!" that is on your friends list.
Tipped Moxxi $10,000.
Got an item from Michael Mamaril.
Unlocked 10 customization items.
Completed 20 side missions.
Gave Claptrap a high five.
Purchased 5 items from the black market.
Phaselocked 100 enemies.
Killed a Constructor without it ever building another bot.
Redeemed 25 tokens.
Reached level 50.
Reached level 25.
Reached level 10.
Reached level 5.
Completed level 1 of all non-level-specific challenges with a single character.
Killed 100 enemies with the Sabre turret.
Gunzerked continuously for 90 seconds.
Remained in Zero's Decepti0n mode for ten seconds straight.
Completed all side missions.
Demonstrated your skill, or lack thereof, at rolling the magical treasure orb of many sides.
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.
Introduced thyself to the White Knight.
Slew Mister Boney Pants Guy.
Showed thine worst enemy, the abomination known as "The Darkness", who is the nerdiest of them all.
Unsheathed 5 swords from Immortal Skeletaurs without leaving the area.
Won the most challenging round in Murderlin's Temple.
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.
Completed the mission "Long Way To The Top".
Completed all Campaign of Carnage side missions.
Collected 10 pictures of Moxxi in Campaign of Carnage.
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.