Full list of all 73 Fallout 3 trophies - 41 bronze, 24 silver, 7 gold and 1 platinum.
The base game contains 51 trophies, and there are 5 DLC packs containing 22 trophies.
Hacked 50 terminals
Reached Level 14 with Bad Karma
Kill all the Super Mutant Behemoths
Completed "Strictly Business"
Collected 20 Vault-Tec Bobbleheads
Completed "Reilly's Rangers"
Completed "Agatha's Song"
Reached Level 20 with Good Karma
Discovered 100 locations
Killed 300 people
Picked 50 locks
Completed "You Gotta Shoot 'Em in the Head"
Completed "Stealing Independence"
Completed "Trouble on the Homefront"
Collected 10 Vault-Tec Bobbleheads
Completed "Oasis"
Completed "Take it Back!"
Reached Level 14 with Good Karma
Completed "The American Dream"
Completed "Finding the Garden of Eden"
Completed "Picking up the Trail"
Completed "The Superhuman Gambit"
Completed "The Waters of Life"
Completed "Tranquility Lane"
Completed "Scientific Pursuits"
Completed "Those!"
Completed "The Wasteland Survival Guide"
Reached Level 8 with Good Karma
Completed "Rescue from Paradise"
Placed a grenade or mine while pickpocketing
Killed 300 creatures
Completed "The Replicated Man"
Completed "Head of State"
Completed "Big Trouble to Big Town"
Completed "Tenpenny Tower"
Reached Level 8 with Bad Karma
Completed "Galaxy News Radio"
Completed "Blood Ties"
Completed "The Power of the Atom"
Completed "Following in His Footsteps"
Completed "Escape!"
Took the G.O.A.T.
Got the Pip-Boy 3000
Collect all other 50 Trophies for this Trophy
Completed "The Nuka-Cola Challenge"
Reached Level 8 with Neutral Karma
Reached Level 14 with Neutral Karma
Reached Level 20 with Bad Karma
Reached Level 20 with Neutral Karma
Made one of every custom weapon
Won 50 Speech Challenges
Completed "Who Dares Wins"
Completed "Shock Value"
Completed "Death from Above"
Reached Level 30 with Bad Karma
Reached Level 30 with Neutral Karma
Reached Level 30 with Good Karma
Completed "This Galaxy Ain't Big Enough…"
Completed "Among the Stars"
Completed "Not of This World"
Collected all Alien Captive Recordings
Completed "Operation: Anchorage!"
Completed "Paving the Way"
Completed "The Guns of Anchorage"
Completed "Aiding the Outcasts"
Completed "A Meeting of the Minds"
Completed "Walking With Spirits"
Completed "The Local Flavor"
Discovered all locations within Point Lookout
Completed "Free Labor"
Completed "Unsafe Working Conditions"
Completed "Into The Pitt"
Found All 100 Steel Ingots