Fallout 3/Perks

Name	Requirements	Rank	Description
Action Boy (Girl)	Level 16, Agility 6	1	With the Action Boy/Girl perk, you gain an additional 25 Action Points to use in V.A.T.S..
Adamantium Skeleton	Level 14	1	With the Adamantium Skeleton perk, your limbs only receive 50% of the damage they normally would.
Animal Friend	Level 10, Charisma 6	2	At the first rank of this perk, animals simply won't attack. At the second rank, they will eventually come to your aid in combat, but never against another animal. This perk affects the Dog, Yao Guai, Mole Rat, and Brahmin.
Better Criticals	Level 16, Perception 6, Luck 6	1	With the Better Criticals perk, you gain a 50% damage bonus every time a critical hit is scored on an opponent.
Bloody Mess	Level 06	1	With the Bloody Mess perk, characters and creatures you kill will often explode into a red, gut-ridden, eyeball-strewn paste. Fun! Oh, and you'll do 5% extra damage with all weapons.
Cannibal	Level 12	1	With the Cannibal perk, when you're in Sneak mode, you gain the option to eat a corpse to regain Health. But every time you feed, you lose Karma, and if the act is witnessed, it is considered a crime against nature.
Chem Resistant	Level 16, Medicine 60	1	Having the Chem Resistant perk means you're 50% less likely to develop an addiction to chems, like Psycho or Jet.
Chemist	Level 14, Medicine 60	1	With the Chemist perk, any chems you take last twice as long.
Child at Heart	Level 04, Charisma 4	1	The Child at Heart perk greatly improves your interactions with children, usually in the form of unique dialogue choices.
Commando	Level 08	1	While using a rifle (or similar two-handed weapon), your accuracy in V.A.T.S. is significantly increased.
Comprehension	Level 04, Intelligence 4	1	With the Comprehension perk, you gain one additional skill point whenever a skill book is read.
Computer Whiz	Level 18, Intelligence 7, Science 70	1	Fail a hack attempt and get locked out of a computer? Not if you're a Computer Whiz! With this perk, you can attempt to re-hack any computer you were previously locked out of.
Concentrated Fire	Level 18, Small Guns 60%, Energy Weapons 60%	1	With Concentrated Fire, your accuracy to hit any body part in V.A.T.S. increase slightly with each subsequent hit on that body part.
[[ Contract Killer	Level 14	1	Once you have the Contract Killer perk, any good character you kill will have an ear on their corpse. This ear can then be sold to a certain person (whose identity is disclosed when you take the perk) for caps and negative Karma.
Cyborg	Level 14, Medicine 60, Science 60	1	You've made permanent enhancements to your body! The Cyborg perk instantly adds +10% to your Damage, Poison, and Radiation Resistances, and 10 points to the Energy Weapons skill.
Daddy's Boy (Girl)	Level 02, Intelligence 4	3	Just like dear ol' Dad, you've devoted your time to intellectual pursuits. You gain an additional 5 points to both the Science and Medicine skills.
Demolition Expert	Level 06, Explosives 50	3	With each rank of this perk, all of your explosive weapons do an additional 20% damage.
Educated	Level 04, Intelligence 4	1	With the Educated perk, you gain three more skill points every time you advance in level. This perk is best taken early on, to maximize its effectiveness.
Entomologist	Level 04, Intelligence 4, Science 40	1	With the Entomologist perk, you do an additional +50% damage every time you attack a mutated insect, like the Radroach, Giant Ant, or Radscorpion.
Explorer	Level 20	1	When you choose the Explorer perk, every location in the world is revealed on your map. So get out there and explore!
Fast Metabolism	Level 12	1	With the Fast Metabolism perk, you gain a 20% Health bonus when using Stimpaks.
Finesse	Level 10	1	With the Finesse perk, you have a higher chance to score a critical hit on an opponent in combat, equivalent to 5 extra points of Luck.
Fortune Finder	Level 06, Luck 5	1	With the Fortune Finder perk, you'll find considerably more Nuka-Cola caps in containers than you normally would.
Grim Reaper's Sprint	Level 20	1	If you kill a target in V.A.T.S., all your Action Points are restored upon exiting Fallout 3/V.A.T.S..
Fallout 3/Gun Nut	Level 02, Intelligence 4, Agility 4	3	You're obsessed with using and maintaining a wide variety of conventional firearms. With each rank of the Gun Nut perk, you gain an additional 5 points to the Small Guns and Repair skills.
Gunslinger	Level 06	1	While using a pistol (or similar one-handed weapon), your accuracy in V.A.T.S. is significantly increased.
Here and Now	Level 10	1	The Here and Now perk immediately grants an additional experience level, complete with all the advantages that brings.
Impartial Mediation	Level 08, Charisma 5	1	With the Impartial Mediation perk, you gain an extra 30 points to Speech... so long as you maintain a Neutral Karma level.
Infiltrator	Level 18, Perception 7, Lockpick 70	1	With Infiltrator, if a lock is broken, and can't normally be picked again, you can attempt to pick it again one more time. This includes locks previously broken by a "Force Lock" attempt.
Intense Training	Level 02	10	With the Intense Training perk, you can put a single point into any of your S.P.E.C.I.A.L. attributes.
Iron Fist	Level 04, Strength 3	3	With the Iron Fist perk, you do an additional 5 points of Unarmed damage perk rank.
Lady Killer/Black Widow	Level 02	1	You do +10% damage against opponents of the opposite sex. You'll sometimes have access to unique dialogue options when dealing with the opposite sex.
Lead Belly	Level 06, Endurance 5	1	With the Lead Belly perk, you take 50% less radiation every time you drink from an irradiated water source.
Lawbringer	Level 14	1	Once you have the Lawbringer perk, any evil character you kill will have a finger on their corpse. This finger can then be sold to a certain person (whose identity is disclosed when you take the perk) for caps and positive Karma.
Life Giver	Level 12, Endurance 6	1	With the Life Giver perk, you gain an additional 30 hit points.
Light Step	Level 14, Perception 6, Agility 6	1	With the Light Step perk, you'll never set off an enemy's mines or floor-based traps.
Little Leaguer	Level 02, Strength 4	3	Years as the Vault little league MVP have honed your hitting and throwing. With every rank, you gain 5 points of Melee Weapons skill and 5 points of Explosives skill.
Master Trader	Level 14, Charisma 6, Barter 60	1	When you take the Master Trader perk, the price of every item you buy from a vendor is reduced by 25%.
Mister Sandman	Level 10, Sneak 60	1	With the Mister Sandman perk, when you're in Sneak mode, you gain the option to silently kill any human or ghoul while they're sleeping. And, all Mister Sandman kills earn bonus XP.
Mysterious Stranger	Level 10, Luck 6	1	You've gained your own personal guardian angel... armed with a fully loaded .44 Magnum. With this perk, the Mysterious Stranger will appear occasionally in V.A.T.S. mode to lend a hand, with deadly efficiency.
Nerd Rage!	Level 10, Fallout_3/Science 50, Intelligence 5	1	You've been pushed around long enough! With the Nerd Rage! perk, your Strength is raised to 10 and you gain 50% to damage resistance whenever your Health drops to 20% or below.
Night Person	Level 10	1	When the sun is down, a Night Person gains +2 to both Intelligence and Perception (up to a maximum of 10). This perk directly affects your "internal clock", and remains active both inside and outside.
Ninja	Level 20, Melee Weapons 80, Sneak 80	1	The Ninja perk grants you the power of the fabled shadow warriors. When attacking with either Melee or Unarmed, you gain a +15% critical chance on every strike. Sneak attack criticals do 25% more damage than normal.
Paralyzing Palm	Level 18, Unarmed 70	1	With Paralyzing Palm, you will sometimes perform a special V.A.T.S. palm strike that paralyzes your opponent for 30 seconds. Note that in order to perform the Paralyzing Palm, you must be completely unarmed.
Fallout 3/Pyromaniac	Level 12, Explosives 60	1	With the Pyromaniac perk, you do +50% damage with fire-based weapons, like the Flamer and Shishkebab.
Rad Resistance	Level 08, Endurance 5	1	Rad Resistance allows you to -- what else? -- resist radiation. This perk grants an additional 25% to Radiation Resistance.
Robotics Expert	Level 12, Science 50	1	With the Robotics Expert perk, you do an additional 25% damage to any robot. But, even better, sneaking up on a hostile robot undetected and activating it will put that robot into a permanent shutdown state.
Scoundrel	Level 04, Charisma 4	3	Take the Scoundrel perk, and you can use your wily charms to influence people - - each rank raises your Speech and Barter skills by 5 points.
Scrounger	Level 08, Luck 5	1	With the Scrounger perk, you'll find considerably more ammunition in containers than you normally would.
Silent Running	Level 12, Agility 6, Sneak 50	1	With the Silent Running perk, you gain an additional 10 points to Sneak, and running no longer factors into a successful sneak attempt.
Size Matters	Level 08, Endurance 5	3	You're obsessed with really big weapons. With each rank of this perk, you gain an additional 15 points to the Big Guns Skill.
Sniper	Level 12, Agility 6, Perception 6	1	With the Sniper perk, your chance to hit an opponent's head in V.A.T.S. is significantly increased.
Solar Powered	Level 20, Endurance 7	1	With the Solar Powered perk, you gain an additional 2 points to Strength when in direct sunlight, and slowly regenerate lost health.
Strong Back	Level 08, Strength 5, Endurance 5	1	With the Strong Back perk, you can carry 50 more pounds of equipment.
Swift Learner	Level 02, Intelligence 4	3	With each rank in the Swift Learner perk, you gain an additional 10% of total Experience Points whenever Experience Points are earned.
Tag!	Level 16	1	The Tag! perk allows you to select a fourth Skill to be a Tag Skill, which instantly raises it by 15 points.
Thief	Level 02, Agility 4, Perception 4	3	With each rank of the Thief perk, you gain an immediate bonus 5 points to both Sneak and Lockpick skills.
Toughness	Level 06, Endurance 5	1	With the Toughness perk, you gain +10% to overall Damage Resistance, up to the maximum of 85%.