GXT

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A GTA Text (GXT) file contains almost all texts that are displayed on the screen of GTA2 and above. The location of those files may differ between the various game versions, but they are usualy located in a text\ folder inside the games installation directory. Except for GTA 2 There is one GXT file for each language, but the number of gxt files does not define the number of supported languages by the game.

File Format

GTA III

GTA III begins with a TKEY block followed by a TDAT block. Within the TKEY block is an array of TKEY entries containing the offset to and the name of the TDAT entry. A TDAT entry contains the text to be displayed in the game.

Block 1 (TKEY)
Offset	Type	Description
0x00	char[4]	"TKEY"
0x04	dword	Size of TKEY block
0x08	TKEY[n]	Array of TKEY entries, where n is the number of entries. All entries are sorted in alphabetical order.

TKEY (0xC bytes):

Offset	Type	Description
0x00	dword	TDAT entry offset. The value is relative to the location of the first entry of the array, which is, in absolute term, size of TKEY block + 16.
0x04	char[8]	TDAT entry name

The absolute location of the TDAT block is the size of TKEY block + 8.

Block 2 (TDAT)
Offset	Type	Description
0x00	char[4]	"TDAT"
0x04	dword	Size of TDAT block
0x08	TDAT[n]	Array of TDAT entries, where n is the number of entries. Entries are not sorted in alphabetical order but their order comes from the order of their entry in the GXT source file.

TDAT (m * 2 bytes):

Offset	Type	Description
0x00	wchar_t[m]	An array of wide characters (2 bytes per character) to be displayed in the game, where m is the number of characters. The array is terminated by a null character (0x0000). The characters are based on the character table in the fonts.txd file, which mostly follows ASCII. The location of the entry in absolute term is TDAT entry offset + size of TKEY block + 16.

GTA San Andreas / GTA IV Format

Each GXT file contains certain tables with entries. And each entry has a unique CRC identifier and a normal text.

Header

The header contains information about the GXT version.

INT32   - 4b   - Version (0x080004 for ASCII, 0x100004 for UTF-16)

Table Block

The Table Block contains data about the subtables and their offsets.

CHAR[4] - 4b   - TABL
INT32   - 4b   - Blocksize

//Array of [Blocksize / 12 Entries]
CHAR[8] - 8b   - Subtablename
INT32   - 4b   - Offset

The Offset of the subtable points to an 8-byte Char Array with the subtable's name, followed by TKEY. For the MAIN Table this points directly to TKEY!

GTA San Andreas has a limit of max 200 tables to be stored per GXT file.

TKEY and TDAT

TKEY

The TKEY Block of an subtable contains the CRC32-values of the entrytitles. The game calculates the CRC32-value out of a given string and checks if they exist in the GXT.

CHAR[4] - 4b   - TKEY
INT32   - 4b   - Blocksize

//Array of [Blocksize / 8]
INT32   - 4b   - Entryoffset
INT32   - 4b   - CRC32 (Entryname)

The TKEY block is directly followed by the TDAT Block which contains the contents of the entries. The Entryoffset is relative to the TDAT + 8 offset.

TDAT

CHAR[4] - 4b   - TDAT
INT32   - 4b   - Blocksize

From here the entryoffset of each entry points to the content. The content can have different sizes. However it always ends in '\0'! For Example "Hello!" needs to be transformed to "Hello!\0" here and this gives a size of 6 bytes (To tell it in a short form content is a null-terminated string). If this is the 1st content in TDAT the next got an offset of 0x06!

Encodings

GTA SA          : Windows-1252 always.
GTA IV(8 bits)  : Custom Encoding
GTA IV(16 bits) : Well, its a fake 16 bits encoding, all you need to take care about first 8 bits(1 byte). 
                  Eg. A3F4 C2DD E922, read only A3, C2, E9.

Sorting

The sorting method for TABL, TKEY, TDAT is as follow:

Section	Sorting method
TABL	Sorted in alphabetical order
TKEY	GTA SA: Sorted from the lowest crc32 to the highest crc32, GTA IV: Unknown. Perhaps randomized order.
TDAT	Not sorted. The data is stored from the first line to the last line in the GXT source file

GTA Vice City Format

GTA Vice City GXT is almost like San Andreas GXT, but differs in

• There's no header
• In TKEY, the keys are stored in a char[8] array instead of a crc32 hash

Table Block

The Table Block contains data about the subtables and their offsets.

CHAR[4] - 4b   - TABL
INT32   - 4b   - Blocksize

//Array of [Blocksize / 12 Entries]
CHAR[8] - 8b   - Subtablename
INT32   - 4b   - Offset

The Offset of the subtable points to an 8-byte Char Array with the subtable's name, followed by TKEY. For the MAIN Table this points directly to TKEY!

TKEY and TDAT

TKEY

CHAR[4] - 4b   - TKEY
INT32   - 4b   - Blocksize

//Array of [Blocksize / 12]
INT32   - 4b   - Entryoffset
CHAR[8] - 8b   - Entryname

Unlike San Andreas entrynames are stored directly in 8b chararrays here. This means to calculate the entries in the table you have to divide the blocksize through 12. The Entryoffsets are relative to the end of the "TDAT Header". This means you have to add the entryoffset to the stream position after the TDAT size. (TDAT_Offset + 8 + Entryoffset), to get to the entry.

TDAT

CHAR[4] - 4b   - TDAT
INT32   - 4b   - Blocksize

The TDAT-Block contains the strings which are displayed by the game. But here are some differences towards San Andreas. The strings are encoded in unicode, which means that each character takes the space of 2 characters (which means 2 bytes per character). Mostly the last byte is 0x00.

Sorting

The sorting method is like the San Andreas method, just changing the TKEY sorting method.

Section	Sorting method
TABL	Sorted in alphabetical order
TKEY	Sorted in alphabetical order
TDAT	Not sorted. The data is stored from the first line to the last line in the GXT source file

GTA2 Format

Except for additional header at beginning GTA2 GXT files are identical to GTA3 format.

The first 4 bytes can be one of following, and identify the language for the file: GBLE - english GBLF - french GBLG - german GBLI - italian GBLS - spanish GBLJ - japanese

A uint16 file version follows which is always 100 (decimal)

Text is stored with some specialities, characters are 16 bit while only one of these bytes is actual character the other may store special data such as gang message icon id, etc.. the text is zero-terminated.

The rest of file is same as gta3 with familiar tkey & tdat sections.

GTA 1 Format

GTA 1 language files have .fxt extension, and it's different from other games' format. Except the first 8 byte it uses very simple encryption. To get text, just substract 1 from every byte. First 8 bytes have different encryption, probably just to confuse modders. For every byte substract a value returned from left shifting 99.

GXT Editing

Symbols & Colorcodes (Control Character)

Symbol	Description
	GTA III	Vice City	San Andreas
~1~	number within a text
~a~	text within a text
~A~			L3 icon (PS2) / LStick icon (XBOX)
~b~	blue text	blue text	blue text
~c~			R3 icon (PS2) / RStick icon (XBOX)
~d~			▼-icon
~g~	green text	hot pink text	green text
~h~	white text		highlight
~j~			R1 icon (PS2) / RT icon (XBOX)
~k~	key (followed by keypresses)
~K~			L1 icon (PS2) / LT icon (XBOX)
~l~	black text	forces text to default color and ignores set colors	black text
~n~			newline
~m~			L2 icon (PS2) / WHITE icon (XBOX)
~o~		pink text	Circle icon (PS2) / B icon (XBOX)
~p~	purple text	purple text	purple text
~q~		plum pink text	Square icon (PS2) / X icon (XBOX)
~r~	red text	hot pink text	red text
~s~			reset color to standard
~t~		green text	Triangle icon (PS2) / Y icon (XBOX)
~u~			▲-icon
~v~			R2 icon (PS2) / BLACK icon (XBOX)
~w~	gray text	gray text	white text
~x~		light blue text	Cross icon (PS2) / A icon (XBOX)
~y~	yellow text	yellow text	yellow text
~z~			subtitle (doesn't shown when the Subtitles option is off)
~<~			◄-icon
~>~			►-icon
Special symbols (otherwise normal or blank)
"	triangle icon
<	◄ icon	armor icon
>	► icon	wanted level (star) icon
@
^
_
{		heart icon
|	circle icon
}		dollar sign icon (not "$")

Note that using "~" by itself will crash the game when the game attempts to display it.

Keypresses

You can use opcode 00E1 to check if these keys are being pressed.

Foot Controls

Key	Game	Entry
Fire		~PED_FIREWEAPON~
Next Weapon / Target		~PED_CYCLE_WEAPON_RIGHT~
Previous Weapon / Target		~PED_CYCLE_WEAPON_LEFT~
Group Ctrl Foward		~GROUP_CONTROL_FWD~
Group Ctrl Back		~GROUP_CONTROL_BWD~
Conversation - No		~CONVERSATION_NO~
Conversation - Yes		~CONVERSATION_YES~
Foward		~GO_FORWARD~
Backwards		~GO_BACK~
Left		~GO_LEFT~
Right		~GO_RIGHT~
Zoom In		~PED_SNIPER_ZOOM_IN~
Zoom Out		~PED_SNIPER_ZOOM_OUT~
Enter+Exit		~VEHICLE_ENTER_EXIT~
Change Camera		~CAMERA_CHANGE_VIEW_ALL_SITUATIONS~
Jump		~PED_JUMPING~
Sprint		~PED_SPRINT~
Target / Aim Weapon		~PED_LOCK_TARGET~
Crouch		~PED_DUCK~
Action		~PED_ANSWER_PHONE~
Walk		~SNEAK_ABOUT~
Look Behind		~PED_LOOKBEHIND~
Look Left	[1]	~PED_1RST_PERSON_LOOK_LEFT~
Look Right	[1]	~PED_1RST_PERSON_LOOK_RIGHT~
Look Up	[1]	~PED_1RST_PERSON_LOOK_UP~
Look Down	[1]	~PED_1RST_PERSON_LOOK_DOWN~
Next Target	[1]	~PED_CYCLE_TARGET_LEFT~
Previous Target	[1]	~PED_CYCLE_TARGET_RIGHT~
Center Camera	[1]	~PED_CENTER_CAMERA_BEHIND_PLAYER~

Vehicle Controls

Key	Game	Entry
Fire		~VEHICLE_FIREWEAPON~
Secondary Fire		~VEHICLE_FIREWEAPON_ALT~
Accelerate		~VEHICLE_ACCELERATE~
Brake / Reverse		~VEHICLE_BRAKE~
Left		~VEHICLE_STEERLEFT~
Right		~VEHICLE_STEERRIGHT~
Steer Foward / Down		~VEHICLE_STEERDOWN~
Steer Back / Up		~VEHICLE_STEERUP~
Enter+Exit		~VEHICLE_ENTER_EXIT~
Trip Skip		~CONVERSATION_YES~
Change Radio Station		~VEHICLE_CHANGE_RADIO_STATION~
Next Radio Station		~VEHICLE_RADIO_STATION_UP~
Previous Radio Station		~VEHICLE_RADIO_STATION_DOWN~
User Track Skip		none
Horn		~VEHICLE_HORN~
Sub-mission		~TOGGLE_SUBMISSIONS~
Change Camera		~CAMERA_CHANGE_VIEW_ALL_SITUATIONS~
Handbrake		~VEHICLE_HANDBRAKE~
Mouse Look		~VEHICLE_MOUSELOOK~
Look Left		~VEHICLE_LOOKLEFT~
Look Right		~VEHICLE_LOOKRIGHT~
Turret Left / Special Ctrl Left		~VEHICLE_TURRETLEFT~
Turret Right / Special Ctrl Right		~VEHICLE_TURRETRIGHT~
Turret Up / Special Ctrl Up		~VEHICLE_TURRETUP~
Turret Down / Special Ctrl Down		~VEHICLE_TURRETDOWN~
Look Behind	[2]	~VEHICLE_LOOKBEHIND~

1. ^ Classic controls key only

2. ^ Hardcoded key in III and VC, unavailable in SA

Unused

Here are some keypress codes only used during development stage. They were removed or replaced later but probably they are still working. Maybe this is useful for further research. Some are only used in PS2 Version.

~TAKE_SCREEN_SHOT~
~SWITCH_DEBUG_CAM_ON~
~TOGGLE_DPAD~
~NETWORK_TALK~

Tools

	GTA2 GXT Editor v2.0 - by Delfi
	Grand Theft Auto GXT Editor v1.3 - by Zverik, retrieved from archive.org
	SAGE v0.9.7 - by AleX AciD
	GTA Texter v0.93 - by feroCT5
	GTAGarage: GXT Editor 1.3 - by Jevon
	GTA: Vice City GXT Editor v1.2 - by CyQ
	GTA San Andreas Text Editor - by JernejL
	GTA: San Andreas GXT Editor v1.3 - by Hammer83
	A-GXT Editor v1.0a - by Aschratt
	X GXT Editor v2.1 - by xmen
	OpenIV - Have Inbuilt GXT file viewer

External links

• List of all GXT entries
• american.gxt source - original code found by Wesser
• Some of GTA IV GXT text entry names
•  GTAForums: List of usable characters