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.
Allowed a goliath to level up four times before killing him.
Killed a Chubby.
Had Purple-rated gear or better equipped in every slot.
Got an item from Michael Mamaril.
Killed a flying enemy with a thrown Tediore weapon.
Completed all side missions.
Completed Round 5 of any Circle of Slaughter.
Completed 20 side missions.
Killed a Constructor without it ever building another bot.
Gave Claptrap a high five.
Tipped Moxxi $10,000.
Redeemed 25 tokens.
Purchased 5 items from the black market.
Discovered all named locations in Three Horns, Tundra Express, and Frostburn Canyon.
Discovered all named locations in Sanctuary, Opportunity, and Lynchwood.
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.
Gunzerked continuously for 90 seconds.
Killed 100 enemies with the Sabre turret.
Remained in Zero's Decepti0n mode for ten seconds straight.
Phaselocked 100 enemies.
Unlocked 10 customization items.
Reached level 10.
Reached level 25.
Reached level 50.
Reached level 5.
Completed level 1 of all non-level-specific challenges with a single character.
Killed Donkey Mong.
Revived someone from "Fight for Your Life!" that is on your friends list.
Won the most challenging round in Murderlin's Temple.
Demonstrated your skill, or lack thereof, at rolling the magical treasure orb of many sides.
Vanquished the Ancient Dragons of Destruction.
Fed thy noble queen 3 times during one visit to her quarters.
Unsheathed 5 swords from Immortal Skeletaurs without leaving the area.
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.
Slew Mister Boney Pants Guy.
Introduced thyself to the White Knight.
Discovered all named locations in Hammerlock's Hunt.
Completed all Hammerlock's Hunt side missions.
Completed the mission "The Fall of Nakayama".
Completed the mission "Long Way To The Top".
Completed all Campaign of Carnage side missions.
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".
Activate the Backburner's firewall.
Allow Tiny Tina to arm the moonshot cannon.
Defeat Haderax the Invincible.
Defeat the Dark Web.
Complete the mission "Paradise Found".