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.
Completed all side missions.
Discovered all named locations.
Reached level 50.
Completed level 1 of all non-level-specific challenges with a single character.
Killed Donkey Mong.
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 Eridium Blight, Arid Nexus, and Sawtooth Cauldron.
Had Purple-rated gear or better equipped in every slot.
Got an item from Michael Mamaril.
Gunzerked continuously for 90 seconds.
Remained in Zero's Decepti0n mode for ten seconds straight.
Discovered all named locations in Sanctuary, Opportunity, and Lynchwood.
Gave Claptrap a high five.
Reached level 25.
Allowed a goliath to level up four times before killing him.
Completed Round 5 of any Circle of Slaughter.
Killed a flying enemy with a thrown Tediore weapon.
Killed 100 enemies with the Sabre turret.
Completed 20 side missions.
Tipped Moxxi $10,000.
Killed a Constructor without it ever building another bot.
Redeemed 25 tokens.
Purchased 5 items from the black market.
Phaselocked 100 enemies.
Reached level 10.
Killed a Chubby.
Reached level 5.
Revived someone from "Fight for Your Life!" that is on your friends list.
Unlocked 10 customization items.
Vanquished the Ancient Dragons of Destruction.
Won the most challenging round in Murderlin's Temple.
Showed thine worst enemy, the abomination known as "The Darkness", who is the nerdiest of them all.
Demonstrated your skill, or lack thereof, at rolling the magical treasure orb of many sides.
Fed thy noble queen 3 times during one visit to her quarters.
Completed thy quest by rescuing yonder queen.
Wielded the Mysterious Amulet.
Unsheathed 5 swords from Immortal Skeletaurs without leaving the area.
Introduced thyself to the White Knight.
Slew Mister Boney Pants Guy.
Completed all Hammerlock's Hunt side missions.
Discovered all named locations in Hammerlock's Hunt.
Completed the mission "The Fall of Nakayama".
Completed all Campaign of Carnage side missions.
Completed the mission "Long Way To The Top".
Collected 10 pictures of Moxxi in Campaign of Carnage.
Discovered all named locations in Oasis and the surrounding Pirate's Booty zones.
Completed all Pirate's Booty side missions.
Completed the mission "X Marks the Spot".
Defeat Haderax the Invincible.
Allow Tiny Tina to arm the moonshot cannon.
Complete the mission "Paradise Found".
Defeat the Dark Web.
Activate the Backburner's firewall.