Full list of all 80 Borderlands Game of the Year Enhanced achievements. It takes around 60-80 hours to unlock all of the achievements on Windows.
I bet you never thought you'd be here
Found all 6 Claptrap statues
Completed a crazy request for Tannis
Killed the Interplanetary Ninja Assassin Claptrap
Collected 3 panties, 5 fish in a bag, and 15 pizzas
Killed Commandant Steele-trap
Killed Dr. Ned-trap
Killed General Knoxx-trap
Collected 15 Claptrap bobbleheads
Found 25 oil cans
Collected 5 3D glasses
Completed the larger challenge in the Hell-Burbia coliseum
Completed each of the larger challenges in all 3 coliseums
Completed the larger challenge in The Angelic Ruins coliseum
Completed the larger challenge in The Gully coliseum
Completed the lesser challenge in all 3 coliseums
Paid for a worthless tour of the world's largest bullet
Reached Level 61
Completed the "Braaaaaaaaaaaaains!" mission
Killed Ned. Again.
Killed Ned...sort of
Completed the "Jakobs Fodder" mission
Completed the "House of the Ned" mission
Completed all missions in the Rust Commons
Completed all missions in Secret Armory
Killed Crawmerax the Invincible
Reached Level 51
Killed each of the loot midgets
Destroyed a Lancer while in a Racer
Destroyed Lance Depot
Earned level 50
Killed the Vault Boss
Rescued enough Claptraps to earn 42 inventory slots
Killed Flynt
Raced around the Ludicrous Speedway in record time
Discovered Eridian Promontory
Discovered Crimson Lance Enclave
Killed the Rakk Hive
Killed an enemy with the Siren's action skill
Rescued Athena
Built the New Car: Monster
Killed an enemy plumber-style
Discovered Trash Coast
Emerged victorious from an arena match
Reached proficiency level 10 with any weapon type
Earned level 40
Killed Krom
Discovered Krom's Canyon
Earned $1,000,000
Killed 15 enemies with the Berserker's action skill
Defeated the Rakk Hive, the Vault Boss, Sledge, Krom, or Flynt in a co-op game
Killed 25 enemies with corrosive weapons
Earned level 30
Discovered The Scrapyard
Completed 5 missions in the Rust Commons
Completed all missions in the Arid Badlands
Completed 15 missions in co-op
Killed 15 enemies with the Hunter's action skill
Rescued a groupmate from death in a co-op game
Won a duel without taking damage
Won a duel against another player
Play with at least two other players.
Killed 25 enemies with shock weapons
Earned level 20
Killed Sledge
Killed 25 enemies with explosive weapons
Discovered Headstone Mine
Equipped a class mod for your character
Applied an elemental artifact
Mastered the technology of Pandora
Killed 25 enemies with incendiary weapons
Discovered Sledge's Safe House
Killed 15 enemies with the Soldier's action skill
Sold 50 guns to a shop
Killed 5 Rakk in under 10 seconds
Killed 25 enemies by ramming them with any vehicle
Earned level 10
Earned level 5
Discovered Skag Gully
Completed 5 missions in the Arid Badlands