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 Round 5 of any Circle of Slaughter.
Killed a Constructor without it ever building another bot.
Tipped Moxxi $10,000.
Allowed a goliath to level up four times before killing him.
Unlocked 10 customization items.
Completed 20 side missions.
Redeemed 25 tokens.
Got an item from Michael Mamaril.
Purchased 5 items from the black market.
Reached level 10.
Phaselocked 100 enemies.
Killed a flying enemy with a thrown Tediore weapon.
Reached level 5.
Revived someone from "Fight for Your Life!" that is on your friends list.
Completed level 1 of all non-level-specific challenges with a single character.
Reached level 25.
Reached level 50.
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.
Had Purple-rated gear or better equipped in every slot.
Killed 100 enemies with the Sabre turret.
Gunzerked continuously for 90 seconds.
Killed a Chubby.
Killed Donkey Mong.
Remained in Zero's Decepti0n mode for ten seconds straight.
Gave Claptrap a high five.
Completed all side missions.
Slew Mister Boney Pants Guy.
Introduced thyself to the White Knight.
Completed thy quest by rescuing yonder queen.
Fed thy noble queen 3 times during one visit to her quarters.
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.
Won the most challenging round in Murderlin's Temple.
Wielded the Mysterious Amulet.
Demonstrated your skill, or lack thereof, at rolling the magical treasure orb of many sides.
Vanquished the Ancient Dragons of Destruction.
Completed the mission "The Fall of Nakayama".
Completed all Hammerlock's Hunt side missions.
Discovered all named locations in Hammerlock's Hunt.
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 the mission "X Marks the Spot".
Discovered all named locations in Oasis and the surrounding Pirate's Booty zones.
Completed all Pirate's Booty side missions.
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".