Technical demonstration mode:
Successfully complete the following modes in order "Training", "Time Trial", "Gun Shooting", "Survival". Note: Completing each mode will unlock the next mode in the sequence. "Technical demonstration" mode will now be unlocked. Use it to watch the CPU demonstrate its best time with the gun.

Alternate costumes:
Successfully complete the game, wait until the credits end, and save the game. Load the saved game file and play through the game again. After successfully completing the game a second time, wait until the credits end, and save the game. Load the saved game and play through the game again. Snake will change into a tuxedo in the elevator during this game.

Alternate ending and music:
Successfully complete the game with the Tuxedo costume.

Konami game surprise:
Play the game using a memory card that contains a saved game from any prior Konami title (Castlevania, ISS Soccer, Suikoden, Silent Hill etc.) When Psycho Mantis attempts to read your character's mind, he will mention various game titles.

Control briefing view:
Wait for the message "Camera Change" or "Camera Free" to appear during a briefing. Press Square or Triangle to zoom in or out. Press Circle to switch views. Press X to stop the briefing.

Stealth gear:
Successfully complete the game under the easy difficulty level after submitting during the torture by pressing Select. Otacon will give your character the stealth gear after being saved. Allow the credits to complete, then save the game. Load the saved game to begin with the stealth gear.

Bandana:
Successfully complete the game without submitting to the torture. Your character will save Meryl and receive the bandana. When equipped, the bandana will allow unlimited ammunition on any weapon.

Camera:
Reach area B2 of the tank hanger. At the end of the hallway to the right of the door where you fight revolver is a secret room that is entered after using C4 explosive. In the room are card 4 and card 6 doors. The camera is in the room behind the card 4 door. Use the camera to take pictures to see various extras, such as the faces of the development team.

Development team photos:
Use the camera to take pictures at the following locations.

 

Name	Location
Fujimura	Elevator in the Comm Tower B complex
Fukushima	Heliport; looking out to sea from cliff
Hirano	Elevator in Comm Tower B; deep in the shaft of top level
Ishiyama	Heliport top of building
Ito	Inside elevator to tank hangar
Jerem Blaustein	Sniper Wolf's corpse
Kaneda	The mirror located in the Women's restroom
Kimura	MG underground base; tip of Metal Gear 's railgun
Kinbara	Dark area of stairs
Kitao	Decoy Octopus (fake DARPA chief) corpse
Kobayashi	Rock in canyon
Kobayashi	Johnny Sasaki holding cell, near DARPA chief
Kojima	Otacon lab; the picture frame to the right
Korekado	Men's restroom
Kozyou	Behind the watertank-like structure in the Canyon
Kutome	Observation room
Makimura	Hidden armory store room; behind the weakened wall
Matsuhana	Hallway of corpses; outside Otacons lab
Mizutani	When fighting Metal Gear
Mori	Lowest point of elevator; Comm Tower B
Mukaide	Reflection in wolfdog cave puddle
Muraoka	Water in cargo dock
Nakamura	In Meryl's blood pool; where she is sniped
Negishi	Sewage waterfall
Nishimura	Next to Baker's corpse
Okajima	Maggots of the real DARPA Chef in cell
Onoda	Where Baker is tied up
Sasaki	Picture frames in the Commander's room
Sato	Comm Tower A; roof destroyed by Hind D missiles
Scott Dolph	Deep down in the dark from the walkway between Comm Towers A and B
Shigeno	Heliport,security caera by staircase
Shikama	Electric floor
Shimizu	Wolf dog cave; first crawling point
Shinkawa	Deep in Sniper Wolf's hallway behind the second pillar
Sonoyama	Torture machine
Takade	Ninja room; glass atedga
Tanaka	Heliport; sleeping soldier
Tougo	End of boiler room; in Blast Furnace with the steam
Toyota	Container in the middle of Raven's warehouse
Uehara	Edge of elevator; where the ravens are
Yamashita	Tip of nuke warhead in nuke storage room
Yoshimura	Dead end of air duct
Yoshioka	Bridge on the third floor of the blast furnace

 

v

Red Grey Fox:
Get to Grey Fox while dressed in the tuxedo.

Run and shoot simultaneously:
Take out your weapon (for example, the SOCOM pistol), then hold Square + X and move Snake on the D-pad. He will run and shoot simultaneously.

Web site credits:
Record the end credits onto a video tape. Pause the tape at the very end and it to see a web address that has information about the next game in the series.

Alternate title screen (Japanese version):
Press the D-pad at the title screen to change the background colors.

 

 

Codec numbers:
Use all these frequencies to contact people in Codec mode.

Roy Campbell and Doctor Naomi Hunter: 140.85 (to back up Snake)

Mei Ling: 140.96

Nastassia Romanenko: 141.52 (Nuclear specialist. Provides healthy information on using weapons)

Master Miller: 141.80 (Provides psychological information and advice. Reveals information on Naomi at the end of the game)

Otacon (Dr. Hal Emmerich): 141.12 (Provides advice on beating Metal Gear)

"Deepthroat": 140.48 (Unknown. Later revealed at the end of the game)

GameShark codes

Faster ninja rescue:
Enable the following code for Ketchup:

800B7574 0001

In the Medi room, use ketchup on the ground four times and let the guard see you. He will start laughing. When he goes to the bathroom , the Ninja will shoot the door and it will open. Kill the guard when he returns. If you get shot, use the ketchup to refill your health. Note: You will not have the level 6 security card if this trick is used.

Enable the following code to walk through walls:

80027250 9CC4
80027252 0800

Go to were the Darpa Chief is located. Enter the level 6 door in the hall were the elevator is located. Wait for approximately five seconds without getting the red box with your clothes. Walk back through the door and go to Jonny Sasaki (the guard on the ground). He will not have the censor blur over his body. Note: You cannot use the elevator until you get the box with your clothes and items.