Welcome to the cheats for Metal Gear Solid for the PlayStation. Below are the cheats.
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. Then, technical demonstration mode will be unlocked. Use it to watch the CPU demonstrate its best time with the gun.
Infinite ammo
Successfully complete the game without submitting to Ocelot when being tortured to save Meryl. Then at the end of the game you will receive a bandana. Save your game, then start a new game using the same saved game. Now when you equip the bandana you can use an unlimited amount of ammo and will not have to reload your gun.
Stealth camouflage
Successfully complete the game with submitting to Ocelot when being tortured to not save Meryl. Then at the end of the game you will receive stealth camouflage. Save your game, then start a new game using the same saved game. Now when you equip the stealth camouflage enemies (except bosses) and cameras will not detect you.
Camera
Reach area B2 of the tank hanger. Then at the end of the hallway to the right of the door where you fight Ocerot is a secret room that is entered after using C4 explosive. In the room are security card level 4 and 6 doors. The camera is in the room behind the security card level 4 door. Alternatively, beat the game with submitting to Ocelot when being tortured. After you receive the camera there will be an "Album" option on the main menu, use this option to view pictures that have been taken.
New textures
Successfully complete the game two times using the same saved game file, and getting a different ending both times by getting the bandana and stealth camouflage. Then during the next (third) time the game is played, reach Ninja without using the bandana or stealth camouflage. If done correctly, Ninja will be red. There will now be new textures for Snake and Ninja and new bonus music during the ending.
Alternate costume
Successfully complete the game two times using the same saved game file, and getting a different ending both times by getting the bandana and stealth camouflage. Then during the next (third) time the game is played, Snake will change into a tuxedo in the elevator.
Alternate title screen
At the title screen, press the D-pad to change the background color.
Codec frequencies
| Name | Frequency |
| Campbell/Naomi | 140.85 |
| Mel Ling | 140.96 |
| Master | 141.80 |
| Otacon | 141.12 |
| Meryl | 140.15 |
| Nastasha | 141.52 |
| Deepthroat | 140.48 |
Konami game surprise
Play the game using a memory card that contains a saved game from any prior Konami title (Castlevania, ISS Soccer, Silent Hill, Suikoden, etc.). Then when Psycho Mantis attempts to read your character's mind, he will mention various game titles.
Pantless Meryl
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 the next sequence.
Humorous Meryl comments
Look at Meryl with the scope or camera.
Hints
Equip a box while in the trucks to travel to the destination on the boxes.
Hidden ghosts
Take a picture of the following locations using the camera to view hidden ghosts who are KCEJ development team members.
