After throwing a stun grenade in close quarters, hide inside the cardboard box to avoid its effect on yourself.
Birthday party
When first starting the game, you will be asked to enter your birthday. When the game is played on that date, there will be a birthday party thrown for you at Mother Base, with a cake and cigars.
Box knock down
Stand near certain safety signs found in Mother Base and a box will fall on your head and knock you down. This only happens once per sign location.
Chicken Hat
When you die several times in short order, you'll gain the option to equip a special piece of gear called the Chicken Hat. While this is equipped, enemies won't engage with you no matter how obvious you make your presence. Instead, they'll pass out while standing. However, it only works three times in a given mission before disappearing on the fourth use, and you won't be able to rank higher than "A" on that particular run. You can enable or disable the special gear from the Options menu, while the game is paused.
Dinging soldiers
Throw an empty magazine clip at a soldier's head to hear a "ding" sound.
Easy Way To Get The Foxhound Emblem
The requirements for the Foxhound Emblem are to do missions repeatedly with total stealth, and no kills. An easy way to bypass this is to replay Mission 11, CLOAKED IN SILENCE, a couple of times without executing Quiet.
Electrocutions
Shoot and down power lines while it is raining to electrocute nearby soldiers.
Mission 04: Quick completion
Go to the Eastern Communications Outpost before starting Mission 04 and disable all of the communication equipment. Mission 04 will immediately end when you start it, and you will hear a secret message on the radio. Note: You will not receive score for this mission by doing this.
Mission 21: Easier completion
Before starting the mission, visit the airport and destroy the camera posts.
Mission 23: Pig head
Find the a pig head near Eli's chair. Shoot the corpse and it will oink.
Mission 28: Varying candle luminescence
Enter the mansion basement and walk past the candles as Navajo and they get brighter. If Big Boss is near them, they will become dimmer.
Mother Base persons
Rescue Persons of Interest and Prisoners of War in Metal Gear Solid 5: Ground Zeroes and upload that saved game file. Download that saved game file from the main menu in Metal Gear Solid 5: The Phantom Pain to get various rewards. The people you rescued will appear at Mother Base as one of your rewards. The people that will appear are as follows.
Assassin Harrier: Appears after two of either Missions 7, 8, or 9.
Bitter Centipede: Appears following Mission 12.
Blue Chameleon: Appears following Mission 6.
Crying Sturgeon: Appears after two of either Missions 7, 8, or 9.
Eye: Appears following Mission 6.
Finger: Appears following Mission 6.
Frigid Mongoose: Appears after two of either Missions 7, 8, or 9.
Gray Wallaby: Appears following Mission 6.
Grizzly Hedgehog: Appears following Missions 3, 4, and 5.
Hideo: Diplomat who appears following Missions 3, 4, and 5.
Hungry Crocodile: Appears following Missions 3, 4, and 5.
Hunting Stallion: Appears after two of either Missions 7, 8, or 9.
Mad Wallaby: Appears after two of either Missions 7, 8, or 9.
Midnight Mastiff: Appears following Mission 6.
Night Tree Frog: Appears following Mission 12.
Ochre Chameleon: Appears following Missions 3, 4, and 5.
Pirate Capybara: Appears following Mission 12.
Roaring Capybara: Appears following Mission 12.
Wild Harrier: Appears following Missions 3, 4, and 5.
Wild Stallion: Appears after two of either Missions 7, 8, or 9.
Music Tapes
These tapes can be played from the cassette menu in the iDroid. You can use the microphone on your binoculars to search the area and pinpoint the tapes location as you will hear the music.
Tape
How to unlock
204863
Kungenga Mine, SW guard post.
A Phantom Pain
Wakh Sind Barracks, NE huts.
All The Sun Touches
Munoko ya Nioka Station.
Behind The Drapery
Da Wialo Kallai.
Dancing With Tears In My Eyes
Ditadi Abandoned Village, under a canopy.
Dormant Stream
Smasei Fort, West guard post.
Friday I'm In Love
Lufwa Valley, inside mansion.
Gloria
Nova Bragia Airport on eastern side in a building.
Heaven's Divide
Near the elevator before you head up to the helipad.
How 'bout them zombies ey?
Bwala ya Masa, easternmost building.
Kids In America
Da Shago Kallai, outside main building.
Love Deterrance
Da Ghwandai Khar, close to where you rescue Kaz.
Love Will Tear Us Apart
Afghanistan Central Base Camp.
Maneater
Lamar Khaate Palace, tent canopy in front of palace.
Midnight Mirage
Bampeve Plantation, northernmost building.
Nitrogen
Serak Power Plant, northernmost building.
Only Time Will Tell
Eastern Communications Post.
Peace Walker Main Theme
Mission 43, in a room with soldiers saluting you.
Planet Scape
Sakhra Ee Village, South guard post.
Quiet Life
Mfinda Oilfield, Southeastern building.
Quiet's Theme
Mission 45, follow footprints in sand.
Rebel Yell
Mountain Relay Base, to the west of the bridge.
Ride A White Horse
Lamar Khaate Palace, North guardpost.
She Blinded Me With Science
Wialo Village Northeast guard post.
Sins Of The Father
Complete Mission 30.
Snake Eater
Munoko ya Nioka Station, west guard post.
Take On Me
Yakho Oboo Outpost, west wing of main outpost.
Take The DW
Da Smasei Laman, under canopy near ampitheater.
The Final Countdown
Qayra Sakhra Ee, east side of village in a small building.
The Tangerine
Spugmay Keep, East guard post.
Too Shy
Kiziba Camp, in a tent by the Anti-Air Radar.
True
Kungenga Mine.
You Spin Me Round (Like A Record)
Lufwa Valley, NW guard post.
Prequel bonuses
Import a saved game file from Metal Gear Solid 5: Ground Zeroes to get the following rewards.
Metal Gear Solid 1 Skin; Snake appears similar to how he was featured in Metal Gear Solid on the original PlayStation version.
Ground Zeroes Sneaking Suit; available as a special upgrade through the Mother Base.
Gold Bionic Arm; only if the saved game file was created after completing Mission 5 "Over the Fence" and rescuing the Bionic Engineer.
Skull extraction
Complete Mission 29 to gain the ability to extract skulls. They can be found at the Mother Base Quarantine Platform. Note: After completing Side Op 144, you will get the Man on Fire's corpse.
Solar charging
You can recharge the night vision goggle batteries and Rocket Arm by running or sprinting when the sun is brightest. With the cardboard box, perform a dash while on fire to extinguish the flames.
Uniforms/Items/Weapons
Once you meet the unlock conditions for these, you can go into your Development menu of your iDroid and develop them provided that you meet the development requirements.
Item
How to unlock
Bandana
Complete Side Op 143.
F-Ballista (D-Walker)
Extract 1000 enemies.
Furicorn Uniform (D-Horse)
Complete Side Op 144.
Gray Fox (1998) Uniform
Complete all MIssions (excluding the High Difficulty Missions).
Gray XOF Uniform (Quiet)
Watch Quiet's Interrogation Scene.
Hand of Jehuty
Complete Side Op 49.
Infinity Bandana
Complete MIssion 46.
Leather Jacket Uniform
Complete Mission 46.
Naked Gold Uniform
Obtain an S-rank on all High Difficulty Missions.
Naked Silver Uniform
Complete all High Difficulty MIssions.
Raiden Uniform
Obtain an S-rank on all main Missions (excluding High Difficulty Missions).
Silver Bionic Arm
Complete all High Difficulty Missions.
Sniper Wolf Uniform (Quiet)
Complete MIssion 40.
Stealth Camo
Complete Huey Emmerich's story.
Tactical Fulton Unifrom (D-Dog)
Find the First Aid Manual Blueprint in Masa Village in Central Africa.
Water Pistol
Complete Mission 18.
Wormhole Fulton
Complete Side Op 50.
Various Trophies
Complete the following tasks to unlock PlayStation 4 trophy rewards.
Trophy
How to unlock
Accomplished (Silver)
Complete all missions.
Achieved (Silver)
Complete all SIDE OPS.
Apprentice (Bronze)
Complete a mission using a Combat Unit staff member.
Architect (Silver)
Construct all available platforms for Mother Base.
Army (Silver)
Raise all Teams/Units to level 50.
Awakening (Bronze)
Complete "PROLOGUE: AWAKENING" mission.
Battalion (Bronze)
Increase Mother Base staff to 250 or more personnel.
Beekeeper (Bronze)
Complete "WHERE DO THE BEES SLEEP?" mission.
Captured (Bronze)
Capture an outpost or guard post.
Caravan (Bronze)
Complete "TRAITORS' CARAVAN" mission.
Cleared (Bronze)
Complete all "Mine Clearing" SIDE OPS.
Collector (Silver)
Obtain all blueprints and key items.
Conservation (Silver)
Extract all wild animal species.
Cry Havoc (Bronze)
Make D-Dog available for deployment.
Deployment (Silver)
Complete all key Dispatch Missions.
Deterrence (Bronze)
Develop a nuclear weapon.
Disappearance (Silver)
Complete "A QUIET EXIT" mission.
Disarmament (Bronze)
Dispose of a nuclear weapon.
Elite (Gold)
Complete all missions with an S rank.
Enhancement (Bronze)
Develop 50 or more development items.
Executed (Silver)
Complete all mission tasks.
Extraction (Bronze)
Fulton extract an enemy soldier.
Gears Turn (Bronze)
Complete "HELLBOUND" mission.
Hero (Silver)
Obtain the codename "Hero."
Immortal (Bronze)
Complete "METALLIC ARCHAEA" mission.
Interrogation (Bronze)
Interrogate an enemy soldier.
Intruder (Bronze)
Play an "Infiltration" FOB mission.
Legend (Platinum)
Obtain all trophies.
Locked and Loaded (Gold)
Develop 300 or more development items.
Man's Best Friend (Bronze)
Raise bond with D-Dog to the maximum.
Phantom Limb (Bronze)
Complete "PHANTOM LIMBS" mission.
Platoon (Bronze)
Increase Mother Base staff to 50 or more personnel.
Prosperity (Bronze)
Earn a total of 10,000,000 GMP or more.
Reinforcement (Silver)
Develop 100 or more development items.
Reminiscence (Bronze)
Obtain all memento photos.
Skull (Silver)
Complete "SAHELANTHROPUS" mission.
Speechless (Bronze)
Make Quiet available for deployment.
To The Rescue (Bronze)
Extract a female prisoner.
Trusty Steed (Bronze)
Raise bond with D-Horse to the maximum.
Truth (Silver)
Complete "TRUTH: THE MAN WHO SOLD THE WORLD" mission.
