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