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