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.
Phaselocked 100 enemies.
Completed level 1 of all non-level-specific challenges with a single character.
Discovered all named locations.
Discovered all named locations in The Highlands, Thousand Cuts, and Wildlife Exploitation Preserve.
Gunzerked continuously for 90 seconds.
Discovered all named locations in Eridium Blight, Arid Nexus, and Sawtooth Cauldron.
Had Purple-rated gear or better equipped in every slot.
Killed Donkey Mong.
Reached level 50.
Completed Round 5 of any Circle of Slaughter.
Discovered all named locations in Three Horns, Tundra Express, and Frostburn Canyon.
Remained in Zero's Decepti0n mode for ten seconds straight.
Discovered all named locations in Sanctuary, Opportunity, and Lynchwood.
Reached level 25.
Killed a flying enemy with a thrown Tediore weapon.
Completed 20 side missions.
Killed a Constructor without it ever building another bot.
Got an item from Michael Mamaril.
Tipped Moxxi $10,000.
Unlocked 10 customization items.
Revived someone from "Fight for Your Life!" that is on your friends list.
Redeemed 25 tokens.
Killed a Chubby.
Killed 100 enemies with the Sabre turret.
Purchased 5 items from the black market.
Allowed a goliath to level up four times before killing him.
Reached level 10.
Gave Claptrap a high five.
Reached level 5.
Won the most challenging round in Murderlin's Temple.
Vanquished the Ancient Dragons of Destruction.
Wielded the Mysterious Amulet.
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.
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".
Collected 10 pictures of Moxxi in Campaign of Carnage.
Completed all Campaign of Carnage side missions.
Completed the mission "Long Way To The Top".
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.