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