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.
Collect all other 50 Trophies for this Trophy
Completed "The Nuka-Cola Challenge"
Made one of every custom weapon
Completed "You Gotta Shoot 'Em in the Head"
Hacked 50 terminals
Completed "The Superhuman Gambit"
Won 50 Speech Challenges
Completed "Blood Ties"
Completed "Head of State"
Reached Level 20 with Good Karma
Reached Level 20 with Neutral Karma
Reached Level 20 with Bad Karma
Discovered 100 locations
Completed "Trouble on the Homefront"
Placed a grenade or mine while pickpocketing
Completed "Galaxy News Radio"
Completed "Following in His Footsteps"
Kill all the Super Mutant Behemoths
Killed 300 people
Completed "The American Dream"
Collected 20 Vault-Tec Bobbleheads
Completed "Finding the Garden of Eden"
Completed "Picking up the Trail"
Completed "The Waters of Life"
Completed "Tranquility Lane"
Completed "Scientific Pursuits"
Completed "Oasis"
Completed "Tenpenny Tower"
Completed "Stealing Independence"
Completed "Strictly Business"
Completed "Big Trouble to Big Town"
Reached Level 14 with Neutral Karma
Reached Level 14 with Good Karma
Reached Level 14 with Bad Karma
Completed "The Replicated Man"
Completed "The Wasteland Survival Guide"
Completed "Take it Back!"
Picked 50 locks
Collected 10 Vault-Tec Bobbleheads
Killed 300 creatures
Completed "Rescue from Paradise"
Completed "Reilly's Rangers"
Reached Level 8 with Neutral Karma
Reached Level 8 with Bad Karma
Reached Level 8 with Good Karma
Completed "Agatha's Song"
Completed "Those!"
Completed "The Power of the Atom"
Completed "Escape!"
Took the G.O.A.T.
Got the Pip-Boy 3000
Reached Level 30 with Bad Karma
Reached Level 30 with Neutral Karma
Reached Level 30 with Good Karma
Completed "Who Dares Wins"
Completed "Shock Value"
Completed "Death from Above"
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"
Discovered all locations within Point Lookout
Completed "The Local Flavor"
Completed "Free Labor"
Completed "Unsafe Working Conditions"
Found All 100 Steel Ingots
Completed "Into The Pitt"