Peace Walker secrets

This article lists the secrets in Metal Gear Solid: Peace Walker.

Interactive cutscenes
While searching through the trucks, the player can come across the following things: the game's director Hideo Kojima will be in one of the trucks and Snake will say "Director!" ("Mr. Kojima!" in the English version). Another one will have metal gears (the machine parts), at which a confused Snake will say "Metal... Gear?!" and another one has a poster of Mei Ling from Metal Gear Solid (the truck's plate is her original Codec frequency). The last one has numerous plushes of Solar Boy Django's sunflower-like companion, Master Otenko from the Boktai series (at which Snake will yell "SUNLIGHT!")

Metal Gear Mk. II makes an appearance in the cutscene between Snake and Huey Emmerich after the Pupa battle.

During cutscene 11 "The Man in the Crater Base", a Gekko from Metal Gear Solid 4 can be spotted on the left side of the screen during Huey's explanation. Zooming in on the bottom right corner will reveal Metal Gear REX.

Briefing files
In a briefing file with Cécile Cosima Caminades, Kazuhira Miller will talk about how her name sounds similar to "Kojima Kaminandesu." In Japanese, Kaminandesu can be translated into "is God", therefore translating the phrase as "Kojima is God". She's named after a real person, Cécile Caminades, who is in charge of press relations at Konami France.

Date with Paz
In Extra Ops, there is a mission where the player can date Paz. During that mission, if the player has the Love Box, they can invite her into the box (actually, using a cardboard box of any sort is required for completing the mission). If the player does the mission while wearing the naked uniform, Paz will become embarrassed and will run away from them. If the player beats this mission with an "S" rank, the next time they do the mission, Paz will be in her underwear. Similarly, there is also an Extra Ops mission where Big Boss dates Kaz, and has similar methods to completing the mission as well as similar results with an "S" rank.

Pooyan
Unlocking Extra Ops 63, 64 and 65 will allow the player to play the game Pooyan. The player will have to shoot all the fultoned soldiers that appear. Pooyan is a well known Konami game. In a briefing file, Kaz tells Snake that his neighbor had a pig named Pooyan.

Logo
The logo for Peace Walker (peace sign with airplane) looks similar to one of the palletes in Metal Gear Solid 3 's title screen.

Tanegashima
When the player shoots a soldier with the Tanegashima, a tornado will shoot up the soldier into the air and Miller will call them and say "There's a soldier hanging on the helicopter", along with other quotes.

Monster Island
After unlocking the Extra Op 121, the player can go to an island where they can fight three monsters from Monster Hunter. They are the Rathalos, Tigrex and Gear REX.

Mother Base staff
Series creator Hideo Kojima makes a cameo in this game as a recruitable soldier for MSF. He can be recruited by selecting the truck in the Crater Base garage with the license plate "CENTRO AMERICA 63824 PEACE SENTINEL." In addition, because of the nature in which he is recruited, he is the only normal soldier who can be fired and then rehired by repeating the recruitment process. In fact, the plate numbers indicate Kojima's birth date: 24th August 1963 (yy/mm/dd). His profile says "70% of my existence is made up of movies, the other 30% is up to you", a take on a famous quote from Kojima. Besides Kojima you can also obtain soldiers that has the faces of: Yumi Kikuch, Akio Otsuka, and Sugita Tomokazu who were the voice actors for Dr. Strangelove, Snake, and Kaz Miller, respectively.

Looking at soldiers' profiles contain many hidden jokes. One of the soldier says "I have a friend named Johnny, do you know him?", referring to Johnny Sasaki's grandfather. Another says "If I have a girlfriend one day, I would like to go in a cardboard box with her." Another one runs to Snake, in disbelief that another soldier believes Santa is real. Yet another reference is to a song, a soldier says "Balls to the wall, boys". Another references Forrest Gump, a soldier says "When this battle’s over, I’m gonna go home and be a shrimper. Me and my buddies are gonna pitch in an buy a big boat." See: Soldier quotes in Metal Gear Solid: Peace Walker

Various characters from past Metal Gear games make cameo appearances as the randomly-assigned profile pictures of recruited personnel. Various fans have pointed out the following examples, though some portraits' similarities may be unintentional: Laughing Octopus; Raging Raven; Crying Wolf; Screaming Mantis; Vamp; Fatman; Fortune; Emma Emmerich; Peter Stillman; The Sorrow; The Fear; Ed; Jonathan; Johnny Sasaki; Mei Ling; Naomi Hunter; and Rosemary. Various staff members, besides Kojima, were used as well. Some faces also resemble ones used in Metal Gear Online, while others are reminiscent of characters from other Kojima projects, such as, Snatcher, Policenauts, and Idea Spy 2.5.