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