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
Earned level 50
I bet you never thought you'd be here
Killed 15 enemies with the Soldier's action skill
Killed 15 enemies with the Berserker's action skill
Raced around the Ludicrous Speedway in record time
Earned level 40
Killed the Vault Boss
Discovered Eridian Promontory
Completed all missions in the Rust Commons
Rescued enough Claptraps to earn 42 inventory slots
Discovered Crimson Lance Enclave
Killed Flynt
Killed the Rakk Hive
Discovered Trash Coast
Earned $1,000,000
Killed Krom
Earned level 30
Discovered Krom's Canyon
Emerged victorious from an arena match
Completed all missions in the Arid Badlands
Completed 5 missions in the Rust Commons
Killed 25 enemies with corrosive weapons
Killed 25 enemies by ramming them with any vehicle
Reached proficiency level 10 with any weapon type
Discovered The Scrapyard
Won a duel against another player
Won a duel without taking damage
Killed 5 Rakk in under 10 seconds
Earned level 20
Sold 50 guns to a shop
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
Killed 25 enemies with incendiary weapons
Discovered Headstone Mine
Mastered the technology of Pandora
Killed 25 enemies with shock weapons
Killed 25 enemies with explosive weapons
Applied an elemental artifact
Played in a co-op game with either an employee of Gearbox or someone who had this trophy
Completed 15 missions in co-op
Discovered Sledge's Safe House
Earned level 10
Killed 15 enemies with the Hunter's action skill
Killed an enemy with the Siren's action skill
Earned level 5
Rescued a groupmate from death in a co-op game
Discovered Skag Gully
Killed an enemy plumber-style
Completed 5 missions in the Arid Badlands
Found all 6 Claptrap statues
Killed General Knoxx-trap
Killed Commandant Steele-trap
Killed Dr. Ned-trap
Killed the Interplanatary Ninja Assassin Claptrap
Completed a crazy request for Tannis
Found 25 oil cans
Collected 15 Claptrap bobbleheads
Collected 5 3D glasses
Collected 3 panties, 5 fish in a bag, and 15 pizzas
Completed the lesser challenge in all 3 coliseums
Completed the larger challenge in the Hell-Burbia coliseum
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
Built the New Car: Monster
Rescued Athena
Destroyed Lance Depot
Killed Crawmerax the Invincible
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