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.
Had Purple-rated gear or better equipped in every slot.
Killed Donkey Mong.
Discovered all named locations.
Got an item from Michael Mamaril.
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 Three Horns, Tundra Express, and Frostburn Canyon.
Discovered all named locations in Sanctuary, Opportunity, and Lynchwood.
Killed a flying enemy with a thrown Tediore weapon.
Killed a Chubby.
Reached level 25.
Allowed a goliath to level up four times before killing him.
Purchased 5 items from the black market.
Completed Round 5 of any Circle of Slaughter.
Redeemed 25 tokens.
Killed a Constructor without it ever building another bot.
Tipped Moxxi $10,000.
Phaselocked 100 enemies.
Completed 20 side missions.
Gave Claptrap a high five.
Reached level 10.
Revived someone from "Fight for Your Life!" that is on your friends list.
Unlocked 10 customization items.
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.
Showed thine worst enemy, the abomination known as "The Darkness", who is the nerdiest of them all.
Vanquished the Ancient Dragons of Destruction.
Wielded the Mysterious Amulet.
Won the most challenging round in Murderlin's Temple.
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.
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".
Activate the Backburner's firewall.
Allow Tiny Tina to arm the moonshot cannon.
Defeat Haderax the Invincible.
Defeat the Dark Web.
Complete the mission "Paradise Found".