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.
Completed level 1 of all non-level-specific challenges with a single character.
Revived someone from "Fight for Your Life!" that is on your friends list.
Discovered all named locations.
Remained in Zero's Decepti0n mode for ten seconds straight.
Gunzerked continuously for 90 seconds.
Discovered all named locations in The Highlands, Thousand Cuts, and Wildlife Exploitation Preserve.
Discovered all named locations in Eridium Blight, Arid Nexus, and Sawtooth Cauldron.
Discovered all named locations in Three Horns, Tundra Express, and Frostburn Canyon.
Reached level 50.
Had Purple-rated gear or better equipped in every slot.
Killed Donkey Mong.
Killed a Chubby.
Got an item from Michael Mamaril.
Completed Round 5 of any Circle of Slaughter.
Phaselocked 100 enemies.
Killed a flying enemy with a thrown Tediore weapon.
Discovered all named locations in Sanctuary, Opportunity, and Lynchwood.
Reached level 25.
Gave Claptrap a high five.
Completed 20 side missions.
Tipped Moxxi $10,000.
Allowed a goliath to level up four times before killing him.
Purchased 5 items from the black market.
Redeemed 25 tokens.
Killed a Constructor without it ever building another bot.
Killed 100 enemies with the Sabre turret.
Reached level 10.
Reached level 5.
Unlocked 10 customization items.
Showed thine worst enemy, the abomination known as "The Darkness", who is the nerdiest of them all.
Fed thy noble queen 3 times during one visit to her quarters.
Won the most challenging round in Murderlin's Temple.
Wielded the Mysterious Amulet.
Vanquished the Ancient Dragons of Destruction.
Completed thy quest by rescuing yonder queen.
Demonstrated your skill, or lack thereof, at rolling the magical treasure orb of many sides.
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.
Collected 10 pictures of Moxxi in Campaign of Carnage.
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 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.