Successfully complete the VR training missions with a 100% ranking. The sound menu will be unlocked at the options screen and allows all game sounds and music to be played.
Successfully complete the game on the easy or greater difficulty setting. The special stage select allows any level to be played with new mission objectives.
Successfully complete stages in the special stage select to get No. 4 to reveal pieces of the plot.
Successfully complete the game, and then start a new game. Dial up 140.07 on the Codec to hear some in-game entertainment.
- Automatic ration use
By equipping rations as opposed to simply using them, they will automatically be used by Snake when needed. This is especially useful in Boss battles, or when there is a chance of being hit by a powerful attack.
- See FaMas bullets
Shoot until you have two bullets left, then equip your bandanna and shoot again.
- Defeating Revolver Ocelot
Use the shoot while running trick and follow him around the arena. Keep shooting him in the back until he is down.
- Defeating the tank
Throw a chaff grenade on the ground, and when it explodes, run towards the tank and throw a grenade into the tank. If the grenade does not go into the tank, it will take a small amount of health off. However, if it did it will instantly kill the guard. It is possible to defeat the tank with only two grenades.
- Get past the wolves
You can use the handkerchief to get past the wolves that are in the cave before the place where you first meet Sniper Wolf.
- See FaMas bullets
Note: You must have a 2.1 or higher version of the Game Shark to use these codes in a Game Boy Color system.
|Have Mine Detector||01060EC6|
|Have Level Key||01040CC6|
|One-Hit Death (All Bosses)||010002C7|
|Random Body Parts Detatch||015401C0|
|Infinite Ammo Slot 1||01FFEFC5|
|Weapon Modifier Slot 1||01??EEC5|
|Infinite Ammo Slot 2||01FFF1C5|
|Weapon Modifier Slot 2||01??F0C5|
|Infinite Ammo Slot 3||01FFF3C5|
|Weapon Modifier Slot 3||01??F2C5|
|Infinite Ammo Slot 4||01FFF5C5|
|Weapon Modifier Slot 4||01??F4C5|
|Infinite Ammo Slot 5||01FFF7C5|
|Weapon Modifier Slot 5||01??F6C5|
|Infinite Ammo Slot 6||01FFF9C5|
|Weapon Modifier Slot 6||01??F8C5|
|Infinite Ammo Slot 7||01FFFBC5|
|Weapon Modifier Slot 7||01??FAC5|
|Infinite Ammo Slot 8||01FFFDC5|
|Weapon Modifier Slot 8||01??FCC5|
|Level Modifier of Level Key||01??0DC6|
|End of Level Stats Screen Modifier Codes|
|Rations Used (00-FF)||01??ECC4|
|Being Found (00-FF)||01??EEC4|
|Enemies Killed (00-FF)||01??F0C4|
|Total Time Modifier Codes|
|Hour Modifier (00-3B)||01??F4C4|
|Minute Modifier (00-3B)||01??F5C4|
|Second Modifier (00-3B)||01??F6C4|
|Quantity Digits to Accompany Item Modifier Code|
|01 - Fogger|
02 - Ration
03 - Thermal Goggles
06 - Mine Detector
07 - Night Visions
08 - Gas Mask
0A - Cardboard Box R
0B - Cardboard Box Y
0C - Cardboard Box B
0D - Body Armor
0E - Fox Hound
0F - Bomb
|Quantity Digits to Accompany Weapon Modifier Code|
|01 - Five Seven|
02 - Assualt Rifle
03 - Nikata Missles
04 - Grenade
05 - Stun Grenade
06 - Chaff Grenade
07 - Land Mine
08 - C4
0A - Bananna