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.
Reached level 50.
Completed Round 5 of any Circle of Slaughter.
Phaselocked 100 enemies.
Killed Donkey Mong.
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.
Got an item from Michael Mamaril.
Had Purple-rated gear or better equipped in every slot.
Discovered all named locations in Sanctuary, Opportunity, and Lynchwood.
Reached level 25.
Gave Claptrap a high five.
Killed a flying enemy with a thrown Tediore weapon.
Killed a Constructor without it ever building another bot.
Unlocked 10 customization items.
Purchased 5 items from the black market.
Redeemed 25 tokens.
Killed a Chubby.
Completed 20 side missions.
Reached level 10.
Reached level 5.
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.
Allowed a goliath to level up four times before killing him.
Discovered all named locations.
Tipped Moxxi $10,000.
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.
Fed thy noble queen 3 times during one visit to her quarters.
Wielded the Mysterious Amulet.
Completed thy quest by rescuing yonder queen.
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.
Demonstrated your skill, or lack thereof, at rolling the magical treasure orb of many sides.
Introduced thyself to the White Knight.
Slew Mister Boney Pants Guy.
Won the most challenging round in Murderlin's Temple.
Vanquished the Ancient Dragons of Destruction.
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".
Defeat the Dark Web.
Activate the Backburner's firewall.
Allow Tiny Tina to arm the moonshot cannon.
Defeat Haderax the Invincible.