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