Fallout 4

Crafting weapons mods or settlement objects will not qualify. Collect dirty water and combine three of them into pure water at a cooking station. Combining drugs will qualify. For example, combine Jet and Psycho to create Psycho Jet at a chemistry station.

Get Dogmeat and return to Sanctuary. Find the "You're Special!" book in the crib and use it. Drop it to the ground from your inventory. Tell Dogmeat to pick it up, but quickly collect it before he does so. If done correctly, he will drop the item and it will still be in your inventory (this can be done with any item to duplicate it) . Pick up the copy Dogmeat dropped and to have two "You're Special" books. Drop both books on the ground and one should activate again. To get unlimited books to increase your stats as desired, drop the book and duplicate it. Drop both books and pick them up. Drop one book and duplicate it, drop all the books and pick them up, then repeat by dropping one book and duplicating it (Video).

Legendary weapon effects are bonuses obtained by defeating certain Legendary enemies

Assassin's: Deal 50% increased damage against humans.

Automatic: Automatic fire mode.

Berserker's: Deal increased damage depending upon your damage resistance.

Bloodied: Deal increased damage depending upon your health.

Cavalier's: Take 15% decreased damage while blocking or sprinting.

Crippling: Deal 50% more limb damage.

Enraging: Your targets frenzy with critical hits.

Explosive: Your bullets to explode on impact dealing 15 area of effect damage.

Exterminator's: Deal 50% increased damage against Mirelurks and bugs.

Freezing: Deal +10 cryo-damage and freeze targets with critical hits.

Furious: Deal increased damage with each consecutive hit on the same target.

Ghoul Slayer's: Deal 50% increased damage against Ghouls.

Hunter's: Deal 50% increased damage against animals.

Incendiary: Set targets on fire for +15 damage.

Instigating: Deal double damage to full health targets.

Irradiated: Deal +50 radiation damage.

Junkie's: Deal increased damage depending upon the withdrawal effects.

Kneecapper: 20% chance to cripple targets' legs.

Lucky Weapon: Deal double damage with critical shots with critical meters refilling 15% faster.

Medic's: Heals targets instead of dealing damage to them.

Mutant Slayer's: Deal 50% increased damage against Super Mutants.

Never Ending: Unlimited ammo capacity.

Nimble: 75% faster movement speed while ADS.

Nocturnal: Deal increased damage at night and decreased damage during the day.

Penetrating: Negate 30% of the target's damage resistance and energy resistance.

Plasma Infused: Turn enemies into goo and add +10 points of energy damage.

Poisoner's: Poison targets for 10 seconds.

Powerful: +25 extra damage.

Quickdraw: Decrease Action Points cost by 25%.

Rapid: 25% increased rate-of-fire and 15% increased reload speed.

Relentless: Refill Action Points with critical hits.

Sentinel's: 15% decreased damage while static.

Staggering: Stagger enemies with each hit.

Stalker's: When not in combat, increases VATS accuracy at the cost of increased Action Points.

Troubleshooter's: Deal 50% increased damage against robots.

Two Shot: Shoot additional projectiles.

VATS Enhanced: Increases VATS hit chances, decreases Action Points cost by 25% and 40%.

Violent: Deal 25% damage and limb damage with increasing recoil.

Wounding: Bleed target for +25 additional damage.

Various issues of the following magazines can be collected to gain the listed bonus.

You're S.P.E.C.I.A.L.!: Typically add 5% to damage against a selection of enemies or make it easier to heal radiation damage.

Astoundingly Awesome Tales: Typically add 5% to damage against a selection of enemies or make it easier to heal radiation damage. (Video)

Grognak The Barbarian: Typically add to the damage dealt with melee or unarmed attacks.

Guns And Bullets: Add about 5% to critical damage for each magazine. (Video)

Hot Rodder: Cusomize Power Armor with Shark Paint, Hot Pink, and Hot Rod Flamespaint jobs. (Video)

La Coiffe: The Hornet's Nest and The Megaton hairstyles. (Video)

Live & Love: Add perks to influence companions, or give you an extra boost when they are around. (Video)

Massachusetts Surgical Journal: Increases limb damage by 2%.

Picket Fences: Unknown.

RobCo FUN!: Get Holotape games.

Taboo Tattoos: Get up to five different tattoos. (Video)

Tales Of A Junktown Jerky Vendor: Improve prices when purchasing from vendors.

Tesla Science: Add 5% to your energy weapon. (Video)

Total Hack: Hack through Protectrons, spotlights, and turrets.

Tumblers Today: Bonus on lockpicking.

U.S. Covert Operations Manual: Improved sneaking.

Unstoppables: Add 1% percent of avoiding all damage from an attack.

Wasteland Survival Guide : Collect extra meat from all animal kills.

Search the following locations to find Power Armor Frames.

• Crashed Vertibird at Covenant Lake; in the water, near the Vertibird.
• Crashed Vertibird at Elevated Freeway; near the Vertibird.
• Crashed Vertibird at Robotics Disposal Ground; near the Vertibird.
• Arturo in the Diamond City.
• Fiddler's Green Trailer Estates; inside a locked trailer.
• Mass Pike Interchange; inside the Gunner Camp.
• Military APCs at Poseidon Energy Turbine Power Armor Part #18-F; near the crashed plane right next to the APCs.
• Military Armor Transport at Lexington; behind a security door and inside a train car.
• Military Armor Transport at North Wilderness; behind a security door and inside a train car.
• Military Checkpoint at Cambridge Outskirts; inside a locked cage.
• Military Convoy at Training Yard; inside the convoy trailer.
• Museum of Freedom; on the rooftop in the Minutemen quest "When Freedom Calls".
• National Guard Training Yard; inside the National Guard Armory.
• Revere Satellite Array; on one of the dish towers.
• Purchased from Teagan in the Prydwen.

Complete the indicated task to unlock the corresponding paint.

Minutemen paint job for T-45 Power Armor: Complete the Minutemen quest "When Freedom Calls".

Railroad paint job for T-51 Power Armor: Complete the Railroad quest "Tradecraft".

Atom Cats paint job for T-60 Power Armor: Complete the miscellaneous quest "Atom Cats".

BOS paint job for T-60 Power Armor: Complete the Brotherhood of Steel quest "Shadow of Steel".

Institute paint job for X-01 Power Armor: Complete the Institute quest "Nuclear Family".

Each Power Armor part has specific stats. Note: Raider Power Armor does not support jet-pack or stealth-boy mods.

Some companions can also become romantic interests. To start a romance, you must reach the maximum relationship with a companion, start a conversation, and choose "Romance". Having a high Luck and Charisma will be useful. If successful you will earn their special perk and can also trigger "Lover's Embrace" by sleeping with your romantic interest to get a temporary experience point bonus.
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Cait

• Location: Encountered in the Combat Zone. Complete her "Benign Intervention" side-quest. She is a master lockpicker.
• Special perk: Trigger Rush. Increases Action Points regeneration when below 25 HP.
• Positive actions: Drinking alcohol, picking locks, pick lock owned, stealing, walking around naked.
• Negative actions: Killing non-hostiles, eating dead bodies, donating items, Chem use and addiction.

Curie

• Location: Encountered at Vault-81. Complete her "Emergent Behavior" side-quest. A robot that is useful with scientific and medical jobs and is skilled with a flamethrower. (Video)
• Special perk: Combat Medic. Gain 100 HP in a day after dropping under 10 HP.
• Positive actions: Donating items, healing Dogmeat.
• Negative actions: Stealing and pickpocketing, killing non-hostiles, Chem addiction.

Hancock

• Location: Encountered in the Goodneighbor. Complete his "Recruiting Hancock" side-quest. A ghoul that can be very friendly or hostile depending upon your actions. (Video)
• Special perk: Isodoped. Deal critical hits 20% faster at 250 rads or more.
• Positive actions: Using Chem, donating items.
• Negative actions: Walking around naked, stealing, killing non-hostile NPCs.

MacCready

• Location: Encountered near the third rail in the Goodneighbor. Complete his "Long Road Ahead" side-quest. An excellent sniper that can provide cover fire. (Video)
• Special perk: Killshot. Increases headshot accuracy in V.A.T.S. by 20%.
• Positive actions: Lockpicking and stealing, Speech success.
• Negative actions: Killing non-hostile NPCs, donating items, Chem addiction.

Paladin Dense

• Location: Encountered in the Cambridge Police Station. Gives excellent backup during combat and is a battlefield expert.
• Special perk: Know Your Enemy. Deals +20 bonus damage to Feral Ghouls, Super Mutants, and Synths.
• Positive actions: Entering Power Armor and Vertibird, modifying armor and weapons.
• Negative actions: Stealing and pickpocketing, pick lock owned, murdering non-hostile NPCs, eating dead bodies, using Chem.

Piper

• Location: Encountered in Diamond City. Complete her "Story of the Century" side-quest. Has a good aim and can provide cover fire with a standard pistol. (Video)
• Special perk: Gift of Gab. Earn double experience when discovering new locations and completing Speech challenges.
• Positive actions: Donating items, healing Dogmeat, lockpicking.
• Negative actions: Stealing, pick lock owned, killing non-hostile NPCs, eating dead bodies.

Preston Garvey

• Location: Encoutnered in the Museum of Freedom. Skilled with a Laser Musket. (Video)
• Special perk: United We Stand. Gain +20 damage resistance and deal +20 extra damage when confronting three or more enemies.
• Positive actions: Donating items, modifying weapons.
• Negative actions: Stealing and pickpocketing, pick locked owned, killing non-hostile NPCs, eating dead bodies, Chem addiction.

Unlock a settlement's workshop to gain control of it and influence it. Each has a requirement that must be met before it can be used.

Abernathy Farm: Complete the "Returning the Favor" quest.

Boston Airport: Complete the "Shadow of Steel" quest.

Bunker Hill: Complete the "The Battle of Bunker Hill" quest.

Castle: Clear the area of hostiles.

Coastal Cottage: Clear the area of hostiles.

County Crossing: Complete the offered radiant quest.

Covenant: Complete the "Human Error" quest or defeat the current residents.

Croup Manor: Clear the area of hostiles.

Egret Tours Marina: Placate or defeat Phyllis Daily.

Finch Farm: Complete the "Out of the Fire" quest.

Graygarden: Complete the "Troubled Waters" quest.

Greentop Nursery: Complete the offered radiant quest.

Hangman's Alley: Clear the area of hostiles.

Jamaica Plain: Clear the area of hostiles.

Kingsport Lighthouse: Clear the area of hostiles.

Murkwater Construction Site: Clear the area of hostiles.

Nordhagen Beach: Complete the offered radiant quest.

Oberland Station: Complete the offered radiant quest.

Outpost Zimonja: Clear the area of hostiles.

Red Rocket Truck Stop: Unknown.

Sanctuary Hills: Unknown.

The Slog: Complete the offered radiant quest.

Somerville Place: Complete the offered radiant quest.

Spectacle Island: Clear the area of hostiles.

Starlight Drive-in: Clear the area of hostiles.

Sunshine Tidings Co-op: Clear the area of hostiles.

Taffington Boathouse: Clear the area of hostiles.

Tenpines Bluff: Complete the offered radiant quest.

Warwick Homestead: Complete the offered radiant quest.

Save the game just before hitting the ground after falling from a fatal height. Load the saved and you will land safely on the ground.