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