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.
Phaselocked 100 enemies.
Remained in Zero's Decepti0n mode for ten seconds straight.
Killed Donkey Mong.
Gunzerked continuously for 90 seconds.
Completed all side missions.
Discovered all named locations.
Discovered all named locations in Sanctuary, Opportunity, and Lynchwood.
Discovered all named locations in Eridium Blight, Arid Nexus, and Sawtooth Cauldron.
Allowed a goliath to level up four times before killing him.
Got an item from Michael Mamaril.
Killed 100 enemies with the Sabre turret.
Killed a Chubby.
Completed Round 5 of any Circle of Slaughter.
Reached level 50.
Discovered all named locations in The Highlands, Thousand Cuts, and Wildlife Exploitation Preserve.
Had Purple-rated gear or better equipped in every slot.
Discovered all named locations in Three Horns, Tundra Express, and Frostburn Canyon.
Gave Claptrap a high five.
Reached level 25.
Completed 20 side missions.
Killed a Constructor without it ever building another bot.
Killed a flying enemy with a thrown Tediore weapon.
Unlocked 10 customization items.
Redeemed 25 tokens.
Revived someone from "Fight for Your Life!" that is on your friends list.
Reached level 10.
Purchased 5 items from the black market.
Tipped Moxxi $10,000.
Reached level 5.
Completed level 1 of all non-level-specific challenges with a single character.
Showed thine worst enemy, the abomination known as "The Darkness", who is the nerdiest of them all.
Won the most challenging round in Murderlin's Temple.
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.
Wielded the Mysterious Amulet.
Slew Mister Boney Pants Guy.
Unsheathed 5 swords from Immortal Skeletaurs without leaving the area.
Introduced thyself to the White Knight.
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.
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".
Allow Tiny Tina to arm the moonshot cannon.
Defeat Haderax the Invincible.
Complete the mission "Paradise Found".
Defeat the Dark Web.
Activate the Backburner's firewall.