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"
Collected 20 Vault-Tec Bobbleheads
Completed "Finding the Garden of Eden"
Completed "Picking up the Trail"
Completed "Trouble on the Homefront"
Completed "The Waters of Life"
Kill all the Super Mutant Behemoths
Completed "Reilly's Rangers"
Completed "Stealing Independence"
Completed "Tranquility Lane"
Completed "Scientific Pursuits"
Completed "Agatha's Song"
Completed "You Gotta Shoot 'Em in the Head"
Completed "The Replicated Man"
Completed "Strictly Business"
Completed "Galaxy News Radio"
Completed "Head of State"
Completed "Following in His Footsteps"
Discovered 100 locations
Hacked 50 terminals
Completed "Oasis"
Killed 300 people
Completed "Those!"
Completed "The Nuka-Cola Challenge"
Reached Level 20 with Good Karma
Reached Level 20 with Bad Karma
Reached Level 20 with Neutral Karma
Completed "Rescue from Paradise"
Won 50 Speech Challenges
Killed 300 creatures
Completed "Tenpenny Tower"
Collected 10 Vault-Tec Bobbleheads
Completed "The Superhuman Gambit"
Made one of every custom weapon
Picked 50 locks
Reached Level 14 with Good Karma
Reached Level 14 with Neutral Karma
Reached Level 14 with Bad Karma
Reached Level 8 with Good Karma
Completed "Blood Ties"
Reached Level 8 with Neutral Karma
Reached Level 8 with Bad Karma
Completed "The Wasteland Survival Guide"
Completed "Big Trouble to Big Town"
Placed a grenade or mine while pickpocketing
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"
Reached Level 30 with Bad Karma
Reached Level 30 with Neutral Karma
Reached Level 30 with Good Karma
Completed "Death from Above"
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"
Discovered all locations within Point Lookout
Completed "A Meeting of the Minds"
Completed "Walking With Spirits"
Completed "The Local Flavor"
Completed "Free Labor"
Found All 100 Steel Ingots
Completed "Unsafe Working Conditions"
Completed "Into The Pitt"