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