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