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