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.

Tuxedo Snake:
When you start your game for the third time on the same save, the memory card icon will be the Ninja. Snake will be change into a tuxedo when he is in the elevator. Additionally, the "Cyber Ninja" will be in a red costume.

Stealth Gear and Bandana:
Successfully complete the game in normal mode after submitting to the torture sequence. Wait through the end credits. A short FMV sequence showing Snake and Emerich getting on a snowmobile will begin. Snake and Emerich will talk for awhile, then Emerich will give him the Stealth Gear. Wait for the score and skill rating screen to appear. Save the game, turn off the PlayStation, then reload the game that was saved. You will start at the first level (dock) and now have the Stealth Gear. You should now not submit to the torture sequence so you can save Meryl and get both the Bandana and Stealth Gear.

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

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

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)

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

Pantless Meryl:
When you find Meryl on patrol in the office, she runs to the women's bathroom. Follow Meryl into the Women's bathroom and reach the last stall in under five seconds. Meryl will be caught with her pants down during an FMV sequence.

Look in the vent just before the DARPA chief (Decoy Octopus) to see Meryl doing sit-ups. Leave the vent and re-enter and she will be doing one-armed pushups. Repeat and she will be doing leg stretches on the wall. Repeat one more time and she will be doing the leg stretches while pantless.

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.

Accurate shots with rocket launcher:
When you get the sniper rifle and the rocket launcher, look through the sniper rifle and aim at your target. Then, quickly change to the rocket launcher and fire. This will result in a more precise and accurate shot.

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.