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