This is simply an alternate version of a ROM. Many games
have been re-released to fix bugs or even to eliminate
Game Genie codes (Yes, Nintendo hates that device).
A bad dump often occurs with an older game or a faulty
dumper (bad connection). Another common source of [b]
ROMs is a corrupted upload to a release FTP.
A fixed game has been altered in some way so that it
will run better on a copier or emulator.
Something in this ROM is not quite as it should be.
Often a hacked ROM simply has a changed header or has
been enabled to run in different regions. Other times
it could be a release group intro, or just some kind
of cheating or funny hack.
An overdumped ROM image has more data than is actually
in the cart. The extra information means nothing and
is removed from the true image.
This code means that game was released by pirates. Offten
various hacks and modifications are present in such
roms. NES's "N in One" (multiple games in
one cartridge) roms are good example of pirated cartridge.
But besides various modificated carts there are some
real home brewed games were released by pirates. Among
them are Tekken 2 and Somari for NES - really good games.
A trainer is special code which executes before the
game is begun. It allows you to access cheats from a
This code means that game was translated to another
language by some Group of people. There are many games
that were released only for use in Japan and hence
they all are in Japaneese. That's why some different
translation groups are trying to translate their favorite
games to english.
Roms with this code may work incorrect or not work at
all in the emulators. Get rid of them.
||Verified Good Dump
Verified good dump. Thank God for these!
Multilanguage (# of Languages)
This code means that was game supports different
languages. Such games were translated officially by
Some games have several versions with defference
among them is only in chechsum. In this case checksum
is reflected in rom's name.
|| ROM Size
If Your rom has such code that mean that this rom
is not recognised by GoodXXXX tool. You can write
about this rom to Cowering. And he'll inculde this
rom in the next version of tool.
This game was released without offical license of the
console's manufacturer. A lot o f such games were released
| Special Codes
This is GameBoy Color rom.
Bung released a programmable cartridge compatable with
the GameBoy which could hold any data you wished to
play. However, many games do not function on Bung v1.0
carts and have to be 'fixed.'
Carts with this code will run on both Japanese and Korean
While this code is technically the same as a (U) code,
it is a newer header format and represents that the
cart will run on USA and Brazil NTSC machines.
||NTSC Only cart
||PAL Only cart
This code represents a cart for Brazil NTSC console.
This code represents a cart with known faulty checksum
These Japanese ROMs were distributed through a satellite
system in Japan known as the Broadcast Satellaview.
They were transmitted along with a TV show which was
connected to the game in some way. These games were
only playable during the show, and thus stop after an
hour, and many were timed so that only certain time
periods were playable.
The Sufami Turbo device allowed two GameBoy sized carts
to be plugged into the SNES. Certain carts combined
into new games much like the Sonic & Knuckles lock-on
technology by Sega.
Nintendo Power has been known to release games only
available to its subscribers. Most of these ROMs are
Japanese, as this practice occured mainly in Japan.
||Release Year Unknown
The PlayChoice 10 was an arcade unit which played exact
copies of NES games in an arcade cabinet. The machines
had a choice of 10 games to choose from and ran for
about 3 minutes on 25 cents.
The Versus system ran on similar hard ware to the PC10
machines, but simply allowed you to play against each
| Country codes
||Japan & Korea
||non USA (Genesis)
||USA & BrazilNTSC
document - GoodCodes (c) Psych0phobiA, 2001
These codes were developed by Cowering for his
execellent set of tools - GoodXXXX
HTML version and a little addons - (c) Emu-Russia,