Metal Gear NES – Codes & Tricks

Tips

By using the Infrared Goggles on the second floor of Building 1, you will not be spotted by the cameras. Machine Gun and Shotgunner are easily killed with rockets and mines, seems rude but works.

Cheat Codes & Passwords

• 999 Bullets: Press [F1][NORIKO][F1]
• One Star Rank: Type [F1][ds 4][F1]
• All Stars At Once: Use [F1]ANTA WA ERAI[F1]
• All Cards: [F1][HIRAKE GOMA][F1]

Complete Password Guide

Introduction

This guide will tell you, in a fairly great amount of detail, how the passwords work in Metal Gear. Using it, you should be able to create a password for any situation in the game you wish, including many passwords that are impossible to get while actually playing the game.

For example, the Hand Gun and M. Gun can hold up to 255 rounds with a password, instead of the usual limit of 250. Also, some passwords can have quite bizarre or humorous results.

One last note: the mechanics of actually creating a password by hand can be tedious and error-prone.

The Password Table

Passwords in Metal Gear are 24 characters long (plus dashes), divided into five groups of five digits each. Each row in the table corresponds to one digit of a password.

Each digit of the password contains five pieces of information that are either true/on ("1") or false/off ("0"). I will call one of these pieces of information a "bit." Thus, each digit is composed of five bits.

Bits-to-Digit Key

Convert the bits in each password digit to the corresponding character:

00000: 1   00001: 2   00010: 3   00011: 4
00100: 5   00101: 6   00110: A   00111: B
01000: C   01001: D   01010: E   01011: F
01100: G   01101: H   01110: I   01111: J
10000: K   10001: L   10010: M   10011: N
10100: O   10101: P   10110: Q   10111: R
11000: S   11001: T   11010: U   11011: V
11100: W   11101: X   11110: Y   11111: Z

Last Digit Checksum

The last digit of the password is special and uses a checksum. This does not hold any information; rather, it is completely determined by the rest of the password. If the last digit does not match what it is supposed to be, the password will be denied.

To determine the last digit:

1. Convert the first 24 digits to numbers using the conversion table
2. Add all these numbers up
3. If the sum is bigger than 507, add an additional 2. If the sum is bigger than 252 (but not bigger than 507), add an additional 1
4. Add an additional 7, regardless
5. If the result is 32 or larger, subtract 32 from it. Keep doing this until you get a number less than 32
6. Convert this number back to a digit. This will be the last digit

Last Digit Value Conversion Key

'1': 0   '2': 1   '3': 2   '4': 3
'5': 4   '6': 5   'A': 6   'B': 7
'C': 8   'D': 9   'E': 10  'F': 11
'G': 12  'H': 13  'I': 14  'J': 15
'K': 16  'L': 17  'M': 18  'N': 19
'O': 20  'P': 21  'Q': 22  'R': 23
'S': 24  'T': 25  'U': 26  'V': 27
'W': 28  'X': 29  'Y': 30  'Z': 31

Noteworthy Passwords

Beginning of Game:

21111 11211
11111 11111
1111D

All Weapons with Full Ammo & Equipment, 4-Star Rank, All Bosses & Prisoners:

WZZZZ YZZZJ
ZOOOZ UYRZZ
NZZZ3

All Equipment, 1-Star Rank (Start with equipment, no transmitter):

21Z11 1ZZZJ
ZOOOZ UYRSZ
1SKJF

Start in Cell (Captured & Trapped):

2511C 11111
11111 11111
K1115

Start in Cell with Supercomputer Defeated (Auto-lose on countdown):

D1111 11111
11111 11111
K1111

Only Cigarettes, Supercomputer & VermonCaTaffy Defeated (Win Immediately):

T1111 11111
11111 11111
11111

Prisoner List

Here is a list of all 22 prisoners with their locations and dialogue:

✍️ NOTE: This "Codes & Tricks" guide is original content compiled and formatted for this site. It is NOT the property of Konami.