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 Round 5 of any Circle of Slaughter.
Killed a Chubby.
Killed Donkey Mong.
Killed a flying enemy with a thrown Tediore weapon.
Phaselocked 100 enemies.
Revived someone from "Fight for Your Life!" that is on your friends list.
Killed 100 enemies with the Sabre turret.
Gave Claptrap a high five.
Reached level 50.
Completed 20 side missions.
Tipped Moxxi $10,000.
Reached level 25.
Allowed a goliath to level up four times before killing him.
Redeemed 25 tokens.
Killed a Constructor without it ever building another bot.
Purchased 5 items from the black market.
Discovered all named locations in The Highlands, Thousand Cuts, and Wildlife Exploitation Preserve.
Had Purple-rated gear or better equipped in every slot.
Discovered all named locations in Sanctuary, Opportunity, and Lynchwood.
Discovered all named locations in Eridium Blight, Arid Nexus, and Sawtooth Cauldron.
Unlocked 10 customization items.
Reached level 10.
Reached level 5.
Completed level 1 of all non-level-specific challenges with a single character.
Discovered all named locations in Three Horns, Tundra Express, and Frostburn Canyon.
Discovered all named locations.
Gunzerked continuously for 90 seconds.
Got an item from Michael Mamaril.
Remained in Zero's Decepti0n mode for ten seconds straight.
Slew Mister Boney Pants Guy.
Unsheathed 5 swords from Immortal Skeletaurs without leaving the area.
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.
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.
Collected 10 pictures of Moxxi in Campaign of Carnage.
Completed the mission "Long Way To The Top".
Completed all Campaign of Carnage side missions.
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.
Complete the mission "Paradise Found".
Defeat the Dark Web.
Allow Tiny Tina to arm the moonshot cannon.
Activate the Backburner's firewall.
Defeat Haderax the Invincible.