Metal Gear Solid 4 is the fourth major game in the Metal Gear Solid series developed by Hideo Kojima. It ties up all of the loose plot points of the previous games while bringing back a number of characters from the earlier games in the series such as Colonel Campbell, Naomi Hunter, Otacon, Meryl Silverburgh, Mei Ling and many more. The game's main antagonist is Liquid Ocelot. Most of the story and the relationship is explained through cut-scenes with a considerable length. Due to the series extensive history, knowledge of the prior games is recommended to fully understand the story.
As the story begins Solid Snake, now looking like an old man due to accelerated aging, is being deployed in the Middle East on a mission to stop Liquid Ocelot. The game is set in 2014, five years after the Big Shell Incident of Metal Gear Solid 2. Liquid aims to take control of Sons of the Patriots, the nanomachine system used to enhance the capabilities of the mercenaries of different factions. By this he plans to assemble an army. The game is divided into five acts followed by an epilogue and a briefing. The various missions bring Old Snake to more than one location, including the Middle East, South America, Eastern Europe and few more that can surprise the players familiar with the franchise.
In this game all of the actions of the previous game have been included along with some new ones such as the ability to roll on your back and fire and the ability to hide in bins scattered around the environment. Similar to Subsistence re-release of MGS3, player has full control of the camera rotation on one analogue stick while walking with the other. Shooting is now enhanced to support new shoulder camera not seen in the franchise before, much similar to that of Resident Evil 4 which will help you to easily counter-attack the enemy without having to fire randomly or switching to 1st-person perspective. The Close Quarters Combat system has been redesigned and players are now able to interrogate guards for information or supplies. The earlier camouflage system has been replaced with Octocamo that allows Snake to blend into the environment. The stamina meter from Snake Eater has been replaced by a stress meter. Based on the fighting and the climate conditions it can offer additional accuracy and reduces sustained damage. The other meter, Psyche, reduces accuracy and can be replenished by reading an adult magazine, eating or drinking.
Snake has access to the largest arsenal of weapons ever made available in a Metal Gear game, with a large array of pistols, rifles and explosives, along with the ability to mod the weapons adding scopes, suppressors, lights and other equipment to create custom weapons.
Other gadgets in the game including the Solid Eye, which is an electronic eye patch that can be used as binoculars, night vision goggles or just a device for displaying information about enemies and items scattered around the levels. There is also the Metal Gear Mk. II, which is a small robot that can be used to scout levels and electrocute enemies knocking them out for a period of time.
The game also features an complex multiplayer mode, simply entitled Metal Gear Online. Aside from the usual suspects of multiplayer shooter modes, such as "deathmatch" and "capture the flag", there are some original modes that are based on the stealth aspects of the single player games. "Sneaking Mission" mostly plays out like a standard team deathmatch, with the exception that one player is assigned to control Snake, who is equipped with his radar and Octocamo. Snake's goal is to tranquilise his enemies in order acquire their dog tags, without getting spotted. If there are enough players in the game, one player will also control Metal Gear Mk.II to assist Snake. "Team Sneaking" is basically "Capture the flag", in which the attacking team is equipped with stealth camouflage and non-lethal weapons. The defending team can only see the attacking team's shadows and weapons.
Otacon's extra passwords
Put these in instead of the code Otacon tells you to at Shadow Moses. You will get the Access Denied scene but afterwards you will get the bonus.
Effect Code
100,000 DP 14893
iPod song 78925
iPod song 13462
Extras Screen Passwords
These passwords are entered at the Extras screen under Password after beating the game once on any difficulty. The items will be made available upon loading your save game or starting a new game (in which case you will gain access to them when you meet up with Metal Gear Mk. II; iPod songs are immediately available.)
Effect Password
Altair Costume aottrykmyn
Drebin Facecamo dntkkhktmm
Type 17 Pistol jmsotsynrn
Unlock Mk. 23 handgun (SOCOM from MGS1) mekakorkkk
Unlocks "Desperate Chase" iPod Song thomas
Unlocks "Gekko" iPod Song george
Unlocks "Midnight Shadow" iPod Song theodore
Unlocks "Mobs Alive" iPod Song abraham
Unlocks "Mosin Nagant" mnsoymsyhn
Unlocks "Subsistence Action" iPod Song mgo2play
Unlocks 1911 Pistol 1aytmmymhk
Unlocks Patriot pkhhnwhsjt
Unlocks Scanning Plug S skynytktjp
Unlocks the Desert Eagle Long Barrel deskyhstyl
Unlocks Thor .45-70 tshsniammr
Bonus Weapons
Unlockable How to Unlock
Bandanna Complete a single-player session without killing anyone (including bosses). You can do this on any difficulty
Desert Eagle, Long Barrel Earn the Fox emblem on a single-player session
Digital Camera In the Nomad vehicle during the mission intermission; you can unlock a special photo by picking up this item in stage 4 instead of earlier
Mantis and Sorrow Dolls Shoot them out of Screaming Mantis's hand and pick them up
Mauser Type 17 Earn the Hound emblem on a single-player session
MGL-140 Grenade Launcer Beat Raging Raven
Mk. 23 Handgun Found in the first area of Act 4
Patriot Future Assault Weapon Earn the Big Boss emblem on a single-player session
Race (Ricochet) Gun Clear the single-player game once
Rail Gun Beat Crying Wolf
Scanning Plug S Log more than 10 hours of Metal Gear Online play time on the same profile as your Metal Gear 4 game. You purchase this from Drebin
Solar Gun Collect the five statues (those of the four Battle Beauties and the Frog Soldier/Haven Troopers in stage 1) using non-lethal means on their respective idols
Stealth Item Complete a single-player session without instigating a single alert (caution is okay, but not alert). You can do this on any difficulty
Thor 45-70 Earn the Fox Hound emblem on a single-player session
New combat vests Clear the single-player game once
The Boss Extreme difficulty Complete the single-player mode once (and saving the cleared data).
Costumes
Unlockable How to Unlock
Altair Obtain the Assassin emblem
Civilian Disguise Start Eastern Europe level
Corpse Camo Get 51 continues or more in a single playthrough to unlock this octocamo.
Middle East Militia Disguise Middle East in the Militia Safe House
South American Rebel Disguise South America (Cove Valley Village)
Suit Clear the game once
Unlockable How to Unlock
Crying Wolf Doll/Statue In a side of a bulding just where you start after killing her beast form
Frog Soldier Doll/Statue At the garage at the end of the battle
Laughing Beast Doll/Statue On a bed in a little room
Raging Raven Doll/Statue On the upper floor on a corner
Screaming Mantis Doll/Statue On the corridor where you started
Facepaint
Different face paint unlocked for in game use.
Unlockable How to Unlock
Big Boss's Earn the Big Boss emblem on a single-player session
Classic MGS Snake Beat Act 3
Crying Wolf Defeat the Battle Beauty (human form) Crying Wolf by non-lethal means.
Drebin Purchase and keep more than 60 different weapons.
FaceCamo Defeat the Battle Beauty Laughing Octopus (the overall battle, no specifics involved).
Laughing Octopus Defeat the Battle Beauty (human form) Laughing Octopus by non-lethal means.
Otacon Ram Dr. Emmerich using the Metal Gear II during the intermission scene.
Raging Raven Defeat the Battle Beauty (human form) Raging Raven by non-lethal means.
Raiden Mask A Ram Sunny using the Metal Gear II during the intermission scene.
Raiden Mask B Ram Dr. Naomi Hunter using the Metal Gear II during the intermission scene.
Roy Campbell Ram Colonel Campbell using the Metal Gear II during the intermission scene.
Screaming Mantis Defeat the Battle Beauty (human form) Screaming Mantis by non-lethal means.
Young Snake Beat Act 2
Young Snake with Bandana Beat Act 2
iPod Tunes
Snake's iPod can download specific tunes throughout the course of the game. Some songs have an additional "secret" effect when it is played in the game.
Unlockable How to Unlock
Beyond the Bounds (increases stun damage done by Snake from non-lethal weapons) Stage 4 Shadow Moses, Tank Hangar. After power is restored, backtrack to the upper catwalk and explore all rooms
Big Boss (increase stun damage and increases Snake's accuracy when played) Earn the Big Boss emblem
Bio-hazard (cause soldiers held by Snake to scream in terror) Stage 3 Europe, Midtown
Boktai 2 Theme Act 2, Mission Briefing, upstairs in the Nomad
Bon Dance Act 2, Marketplace
Destiny's Call (cause soldiers held by Snake to go enraged) A random gift from a militia or rebel soldier if Snake gives them a healing item
Flowing Destiny (cause soldiers held by Snake to weep like a little girl) Stage 4 Shadow Moses, Canyon. Before leaving the canyon area, examine the rocky walls for a hole hiding this item
Fury, The (cause soldiers held by Snake to go enraged) Stage 2 South America, Cove Valley Village. Inside the fire ravaged house
Inorino Uta Act 1, Mission Briefing
Level 3 Warning Act 1, Advent Palace
Lunar Knights Main Theme Act 4, Mission Briefing, upstairs in the Nomad
Metal Gear 20 Years History: Part 2 Act 4, Warhead Storage Building B2
Metal Gear 20 Years History: Part 3 Act 2, South America Confinement Facility. In room with beds inside the house
Metal Gear Solid Main Theme (The Document Remix) Act 5, Under hatch to the left at the beginning of area
MGS 4 Love Theme / Action (cause soldiers held by Snake to weep like a little girl) A random gift from a militia or rebel soldier if Snake gives them a healing item
On Alert Act 3, Midtown N Sector
One Night in Neo Kobe City (Causes soldiers held by Snake to laugh) Act 3, Midtown, hold-up PMC.
Opening - Old L.A. 2040 (increase Snake's accuracy) Stage 4 Shadow Moses, Nuclear Warhead Storage B2. Input 78925 into Otacon's lab computer
Policenaughts Ending (cause soldiers held by Snake to fall asleep on touch) Stage 4 Shadow Moses, Nuclear Warhead Storage B2. Input 13462 into Otacon's lab computer
Rock Me (increases Snake's amount of life recovered from items and other means) Stage 2 South America, Confinement Facility. Island in the south-eastern quadrant
Sailor (increases Snake's amount of life recovered from items and other means) Stage 2 South America, Vista Mansion. Between the east wall and a cargo container
Shin Bokura no Taiyou Theme Act 3, Mission Briefing, upstairs in the Nomad
Show Time (cause soldiers held by Snake to scream in terror) A random gift from a militia or rebel soldier if Snake gives them a healing item
Snake Eater (increase the life recovery rate of Snake through items and other actions) Unlocked by earning all 40 game clear emblems
Subsistence (increase Snake's accuracy) Play at least one game of Metal Gear Online. You must start the match with at least two players
Test Subject's Duality Act 3, Midtown S Sector
The Best Is Yet To Come Act 4, Snow Field. Just before the "Disc Change" Codec scene.
The Essence of Vince Act 3, Echo's Beacon
The Fury Act 2, in the Cave Valley Village in badly burned building
Theme of Solid Snake Act 1, Millennium Park
Theme Of Tara Act 1, Militia Safehouse. Just before seeing the unmanned flying-bomber on the table
Warhead Storage Act 4, Tank Hanger. Upper floor ventilation shaft.
Yell (Dead Cell) Act 4, Casting Facility North
Zanzibarland Breeze Act 1, Urban Ruins before cutscene
New Ammo
After finishing the game once, and getting back to drebin you can buy:
Unlockable How to Unlock
Emotive ammo (cry) Finish game once
Emotive ammo (laughter) Finish game once
Emotive ammo (rage) Finish game once
Emotive ammo (scream) Finish game once
Smoke Grenade (blue) Finish game once
Smoke Grenade (green) Finish game once
Smoke Grenade (red) Finish game once
Smoke Grenade (yellow) Finish game once
Unlockable Emblems
Unlocking emblems gives you various bonus content.
Unlockable How to Unlock
Ant Emblem Shake 50 enemies for items
Assassin's Emblem Beat the game with 50+ knife kills, 50+ CQC holds, and 25 or less alerts.
Bear Emblem Choke 100 enemies to death
Bee Emblem Use the Scanning Plug S or Syringe on 50 enemies
Big Boss Emblem Beat the game on the highest difficulty with no deaths, no alerts, no kills, no recovery items, no stealth suit, no bandanna items, in under 5 hours.
Blue Bird Emblem Give friendly soldiers 50 items
Centipede Get less than 75 alert phases, less than 250 kills, and over 25 continues.
Chicken Get over 150 alert phases, over 500 kills, over 50 continues, use over 50 recovery items and finish the game in over 35 hours.
Cow Activate over 100 alerts
Crocodile Have over 400 kills
Eagle Emblem Get 150 headshots
Fox Emblem Beat the game on normal or higher w/ no deaths, 5 or less alerts, no kills, no recovery items, no stealth suit, no bandanna items, in under 6 hours.
Fox Hound Emblem Beat the game on hard or higher w/ no deaths, 3 or less alerts, no kills, no recovery items, no stealth suit, no bandanna items, in under 5.5 hours.
Frog Emblem Roll forward 200 times
Gecko Emblem Press against walls for a total of 1 hour
Giant Panda Emblem Complete the game after 30 cumulative hours of play
Gibbon Emblem Hold up 50 enemies
Hawk Emblem Be admired by 25 friendly soldiers
Hog Emblem Get 10 combat highs
Hound Emblem Beat the game on hard or higher w/ no deaths, 3 or less alerts, no kills, no recovery items, no stealth suit, no bandanna items, in under 6.5 hours.
Hyena Emblem Pick up 400 dropped weapons
Inch Worm Emblem Crawl on the ground for a total of 1 hour
Jaguar Get over 75 alert phases, less than 250 kills, and less than 25 continues.
Leopard Get over 75 alert phases, less than 250 kills, and over 25 continues.
Little Gray Emblem Collect all 69 weapons
Lobster Emblem Spend a total of 2.5 hours crouching
Mantis Finish the game with no alerts activated, no continues, no rations, noodles or regains used and in under 5 hours
Octopus Beat the game without activating any alert phases.
Panther Get over 75 alert phases, over 250 kills, and less than 25 coninues.
Pig Use more than 50 recovery items
Pigeon Beat the game without killing asingle person (Gekkos and Dwarf Gekkos dont count).
Puma Get over 75 alert phases, over 250 kills, and over 25 continues.
Rabbit Flick through 100 Playboy pages
Raven Beat the game in under 5 hours
Scarab Perform over 200 prone side rolls
Scorpion Get less than 75 alert Phases, less than 250 kills, and less than 25 continues.
Spider Get less than 75 alert phases, over 250 kills, and over 25 continues.
Tarantula Get less than 75 alert phases, over 250 kills, and less than 25 continues.
Tortoise Spend more than 60 minutes inside the drum can or card board box (this can be done throughout the game, not all at once)
Wolf Beat the game with no continues and no rations, regains, or noodles used
Beauty and the Beast Photoshoot
While fighting the second form of any B&B unit stall for 3 minutes. After that the whole area around Snake and the beast will go white. If you have obtained the camera already once you pull it out the Beast will pose for you.
Cheaper Prices In Drebin's Store
Set the PS3 system date to a Wednesday or Sunday, and Drebin will have cheaper prices. Also, in Act 5 all prices are halfed.
Inheritence
You carry over your Drebin points, weapons, ammunition, items, and special items from a previous game upon game clear. However, Snake will need to encounter Metal Gear II in the first stage to get his stuff back.
Be sure to save your cleared data upon game completion to track your items. Load the cleared data to reap your benefits.
No More Camo
Shake the Sixaxis controller to return Snake's Octocamo to its neutral (black and blue) pigmentation.
Refill Psyche During Cut-scenes
If during a cut-scene something causes Snakes psyche gauge to decrease just press X rapidly to replenish it.
Show Me Your Motions
When a character is introduced for the first time, press R2 to view that characters motion capture person instead of that person's voice actor.
User Notice 
