Here is the full list of all 80 Borderlands: Game of the Year Edition achievements worth 1,750 gamerscore.
Killed 15 enemies with the Soldier's action skill
Paid for a worthless tour of the world's largest bullet
I bet you never thought you'd be here
Completed a crazy request for Tannis
Collected 5 3D glasses
Found all 6 Claptrap statues
Killed the Interplanetary Ninja Assassin Claptrap
Killed Commandant Steele-trap
Killed Dr. Ned-trap
Killed General Knoxx-trap
Destroyed Lance Depot
Destroyed a Lancer while in a Racer
Rescued Athena
Built the New Car: Monster
Completed the lesser challenge in all 3 coliseums
Completed the "Braaaaaaaaaaaaains!" mission
Killed Ned. Again.
Killed Ned...sort of
Earned level 40
Completed the "Jakobs Fodder" mission
Completed the "House of the Ned" mission
Killed an enemy plumber-style
Rescued enough Claptraps to earn 42 inventory slots
Completed all missions in the Arid Badlands
Killed the Vault Boss
Discovered Eridian Promontory
Discovered Crimson Lance Enclave
Completed all missions in the Rust Commons
Killed Flynt
Earned $1,000,000
Killed the Rakk Hive
Discovered Trash Coast
Earned level 30
Killed Krom
Reached proficiency level 10 with any weapon type
Discovered Krom's Canyon
Killed 25 enemies with corrosive weapons
Killed 25 enemies with shock weapons
Completed 5 missions in the Rust Commons
Discovered The Scrapyard
Earned level 20
Equipped a class mod for your character
Defeated the Rakk Hive, the Vault Boss, Sledge, Krom, or Flynt in a co-op game
Killed Sledge
Sold 50 guns to a shop
Discovered Headstone Mine
Applied an elemental artifact
Mastered the technology of Pandora
Completed 15 missions in co-op
Played with at least two other players.
Rescued a groupmate from death in a co-op game
Killed 15 enemies with the Hunter's action skill
Discovered Sledge's Safe House
Killed 25 enemies with incendiary weapons
Killed 5 Rakk in under 10 seconds
Killed 25 enemies by ramming them with any vehicle
Killed 25 enemies with explosive weapons
Earned level 10
Discovered Skag Gully
Earned level 5
Completed 5 missions in the Arid Badlands
Race around the Ludicrous Speedway in record time
Earn level 50
Emerge victorious from an arena match
Win a duel against another player
Win a duel without taking damage
Kill an enemy with the Siren's action skill
Kill 15 enemies with the Berserker's action skill
Complete the larger challenge in the Hell-Burbia coliseum
Complete the larger challenge in The Angelic Ruins coliseum
Complete the larger challenge in The Gully coliseum
Complete each of the larger challenges in all 3 coliseums
Kill Crawmerax the Invincible
Kill each of the loot midgets
Reach Level 51
Reach Level 61
Complete all missions in Secret Armory
Find 25 oil cans
Collect 15 Claptrap bobbleheads
Collect 3 panties, 5 fish in a bag, and 15 pizzas