Full list of all 81 Borderlands trophies - 59 bronze, 17 silver, 4 gold and 1 platinum.
The base game contains 51 trophies, and there are 5 DLC packs containing 30 trophies.
You have defeated all bosses and are a powerful force to be reckoned with
Emerged victorious from an arena match
Earned level 50
Rescued enough Claptraps to earn 42 inventory slots
Completed all missions in the Rust Commons
Killed an enemy with the Siren's action skill
Killed 15 enemies with the Hunter's action skill
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 the Vault Boss
Killed Flynt
Killed the Rakk Hive
Discovered Trash Coast
Killed Krom
Discovered Krom's Canyon
I bet you never thought you'd be here
Completed 5 missions in the Rust Commons
Raced around the Ludicrous Speedway in record time
Completed all missions in the Arid Badlands
Mastered the technology of Pandora
Killed 25 enemies with corrosive weapons
Applied an elemental artifact
Killed 25 enemies with explosive weapons
Killed Sledge
Killed 25 enemies by ramming them with any vehicle
Discovered Sledge's Safe House
Killed 5 Rakk in under 10 seconds
Won a duel against another player
Won a duel without taking damage
Killed 25 enemies with incendiary weapons
Killed 25 enemies with shock weapons
Earned level 40
Discovered Headstone Mine
Completed 15 missions in co-op
Discovered Skag Gully
Killed 15 enemies with the Soldier's action skill
Rescued a groupmate from death in a co-op game
Discovered Crimson Lance Enclave
Discovered Eridian Promontory
Sold 50 guns to a shop
Equipped a class mod for your character
Earned level 30
Earned $1,000,000
Earned level 20
Earned level 5
Reached proficiency level 10 with any weapon type
Earned level 10
Completed 5 missions in the Arid Badlands
Killed an enemy plumber-style
Discovered The Scrapyard
Played in a co-op game with either an employee of Gearbox or someone who had this trophy
Collected 15 Claptrap bobbleheads
Collected 3 panties, 5 fish in a bag, and 15 pizzas
Completed a crazy request for Tannis
Collected 5 3D glasses
Killed the Interplanatary Ninja Assassin Claptrap
Killed Commandant Steele-trap
Killed Dr. Ned-trap
Found all 6 Claptrap statues
Killed General Knoxx-trap
Found 25 oil cans
Completed the larger challenge in the Hell-Burbia coliseum
Completed the lesser challenge in all 3 coliseums
Completed the larger challenge in The Angelic Ruins coliseum
Completed the larger challenge in The Gully coliseum
Completed each of the larger challenges in all 3 coliseums
Killed Crawmerax the Invincible
Built the New Car: Monster
Rescued Athena
Destroyed Lance Depot
Killed each of the loot midgets
Destroyed a Lancer while in a Racer
Reached Level 61
Completed all missions in Secret Armory
Paid for a worthless tour of the world's largest bullet
Completed the "House of the Ned" mission
Completed the "Jakobs Fodder" mission
Killed Ned...sort of
Killed Ned. Again.
Completed the "Braaaaaaaaaaaaains!" mission
Reached Level 51