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.
Discovered all named locations in Three Horns, Tundra Express, and Frostburn Canyon.
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 Sanctuary, Opportunity, and Lynchwood.
Phaselocked 100 enemies.
Reached level 50.
Killed a flying enemy with a thrown Tediore weapon.
Had Purple-rated gear or better equipped in every slot.
Reached level 25.
Revived someone from "Fight for Your Life!" that is on your friends list.
Completed Round 5 of any Circle of Slaughter.
Tipped Moxxi $10,000.
Killed a Chubby.
Killed a Constructor without it ever building another bot.
Killed 100 enemies with the Sabre turret.
Completed 20 side missions.
Redeemed 25 tokens.
Got an item from Michael Mamaril.
Gave Claptrap a high five.
Reached level 10.
Purchased 5 items from the black market.
Unlocked 10 customization items.
Reached level 5.
Completed level 1 of all non-level-specific challenges with a single character.
Discovered all named locations.
Gunzerked continuously for 90 seconds.
Killed Donkey Mong.
Remained in Zero's Decepti0n mode for ten seconds straight.
Completed all side missions.
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.
Completed thy quest by rescuing yonder queen.
Unsheathed 5 swords from Immortal Skeletaurs without leaving the area.
Introduced thyself to the White Knight.
Demonstrated your skill, or lack thereof, at rolling the magical treasure orb of many sides.
Slew Mister Boney Pants Guy.
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 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.
Allow Tiny Tina to arm the moonshot cannon.
Activate the Backburner's firewall.
Defeat Haderax the Invincible.
Complete the mission "Paradise Found".