Game.dtz

GAME.DTZ (DaTa Zlib) is a file regarding PS2 and PSP versions of GTA LCS and GTA VCS. It contains data files, as well as main textures and models analogue to existing 3D era games compiled in binary form. It is compressed using the zlib/deflate algorithm [1] (max compression). Its contents can be viewed using any zlib compression/decompression utility, such as offzip [2] and zdrop, though some can be viewed with DTZ Editor [3], a tool made by Dageron.

Header

The Header for both GTA LCS and GTA VCS versions is defined like so: Note: this about the decompressed version, GAME.DAT. All values are Little-Endian.

0x0   [4b] "GTAG" signature
0x4   [4b] 1, unknown
0x8   [4b] size of decompressed file
0xC   [4b] ?
0x10  [4b] offset to global table of offsets 
0x14  [4b] number of offsets in global table
0x18  [4b] same as 0xC
0x1C  [2b] ?
0x1E  [2b] ?

Below is the data table which is different between games: LCS Version

tba

VCS Version PS2

0x20  paths
0x24  offset to "Buildings" info
0x28  offset to "Treadables" info
0x2C  offset to "Dummys" info
0x30  offset to "EntryInfoNode" info
0x34  offset to "PtrNode" info
0x38  number of offsets in IDE table
0x3C  offset to IDE table
0x40  car class table (poorfamily, etc.)
0x44  number of cars in each class
0x48  offset to GTA3.ZON
0x4C  0, ?
0x50  0, ?
0x54  number of 2dfx data "lines"
0x58  offset to 2dfx data
0x5C  ? (has to do with model indices)
0x60  offset to "Texlist" info
0x64  0, ?
0x68  ?
0x6C  0, ?
0x70  ?
0x74  offset to OBJECT.DAT
0x78  ?
0x7C  offset to GTA3PS2.DIR
0x80  offset to animation data
0x84  offset to FISTFITE.DAT
0x88  offset to PED.DAT offset table
0x8C  offset to PEDSTATS.DAT offset table
0x90  offset to car colours data
0x94  ?
0x98  number of CULL.IPL "lines"
0x9C  offset to CULL.IPL
0xA0  0, ?
0xA4  0, ?
0xA8  offset to WATERPRO.DAT
0xAC  offset to weather types table
0xB0  offset to SURFACE.DAT
0xB4  offset to TIMECYC.DAT
0xB8  offset to PEDGRP.DAT
0xBC  offset to PARTICLE.CFG
0xC0  offset to WEAPON.DAT
0xC4  0, ?
0xC8  offset to models offset table
0xCC  offset to MOCAPPS2.DIR
0xD0  ?
0xD4  0, ?
0xD8  ?
0xDC  0, ?
0xE0  offset to FRONTENT.TEX (zlib/deflate compressed)
0xE4  ?
0xE8  ?
0xEC  ?
0xF0  ?
0xF4  ?
0xF8  size of decompressed FONTS.TEX
0xFC  offset to FONTS.TEX (zlib/deflate compressed)
0x100 offset to radar textures offset table

Table of Analogy

Needs some serious editing

Description	Analogy	Offset	Notes
Textures
textures of menu	frontend.txd	LCS PS2: 0x4E4A30 LCS PSP: 0x4DA830 VCS PS2: 0x581330 VCS PSP: 0x51D95C	contain texture of menu, packed deflate/zlib algorithm (*)
texture of fonts	fonts.txd	LCS PS2: 0x4EF4D8 LCS PSP: 0x4E2B1C VCS PS2: 0x57BE4C VCS PSP: 0x530AFC	also packed deflate/zlib algorithm (*)
particle effects	particle.txd	LCS PS2: 0x4A1C28 LCS PSP: 0x38AB90 VCS PS2: 0x761F0 VCS PSP: 0x3F7FB0	contain all textures of particle effect (*)
generic-textures	generic.txd, wheels.txd, vehicle.txd	LCS PS2: 0x4A1BFC LCS PSP: 0x392B04 VCS PS2: 0x539E0 VCS PSP: 0x3D60B4	contains general textures for cars and all the textures of wheels (*)
radar icons	hud.txd	LCS PS2: 0x4A1BE4 LCS PSP: 0x38AD30 VCS PS2: 0x287B0 VCS PSP: 0x3B4678	contain icons for hud (*)
texture of radar	radarNN.txd		Contain textures for radar
Animation
?	ped.ifp
?	swim.ifp		only in GTA VCS
?	fight.ifp		only in GTA VCS
?	driveby.ifp		only in GTA VCS
DIR-files
for cuts.img	cuts.dir		not working
for GTA3PS2.IMG	GTA3PS2.dir		specific for stories, doesn't contain the names.
Collision
?	peds.col		peds.col2
?	vehicles.col		vehicles.col2
?	weapons.col		weapons.col2
Models
model of plane	air_vlo.dff		air_vlo.mdl
model of arrow	arrow.dff		arrow.mdl
model of wheels	wheels.dff
model of marker (zone)	zonecylb.dff
IDE / IPL / DAT
IDE	*.ide		contain all name of models and textures.
IPL	*.ipl		contains all the coordinates for the placement of collisions in the game.
colors of cars	carcols.dat
cullzone data	cullzone.dat
fistfite data	fistfite.dat
handling data	handling.dat	LCS PS2: 0x1647A0 LCS PSP: 0x50190 VCS PS2: 0x4C2A10 VCS PSP: 0x3AF30F	LCS and VCS have different structure of handling
	info.zon
	map.zon
object data	object.dat
particle data	particle.cfg	LCS PS2: 0x3917D0	characteristics of special effects
pedstats data	pedstats.dat	LCS PS2: part 1 - 0x49E820 part 2 - 0x49EB78 part 3 - 0x4A1A10 LCS PSP: 0x391DA0 VCS PS2: part 1 - 0x4C8080 part 2 - 0x4C8428 VCS PSP: 0x3B1F10	characteristics of pedestrians, in the PS2-version split into parts LCS PS2: part 1 - 15 items part 2 - 18 items part 3 - 9 items LCS PSP: 42 items VCS PS2: part 1 - 6 items part 2 - 36 items VCS PSP: 42 items
timecyc data	timecyc.dat
data about waters surfaces	waterpro.dat
weapon data	weapon.dat	VCS PS2: 0x3D7530 VCS PSP: 0x2E8B60
Other
SDT-files.			only in PSP versions

Notes:

• Offset is specified for the unpacked game.dtz
• * - Data marked with (*) are opened by GTA Stories Texture Explorer.

Data Formats

weapons data

Analog of weapons.dat

Structure of LCS version

Total number of records: 38

typedef struct vFireOffset{
    float       x;
    float       y;  
    float       z;        
};

typedef struct vTimeStrc{
    float       a;
    float       b;  
    float       c;        
};

typedef struct weapondata{
    int		FireType;
    float	Range;
    int		FiringRate;
    int		Reload;
    int		AmountOfAmmunition;
    int		Damage;
    float	Speed;
    float	Radius;
    float	LifeSpan;
    float	Spread;
    DWORD	padding1;
    DWORD	padding2;
    vFireOffset	FireOffset;
    DWORD	zero;
    DWORD	anim_id;
    vTimeStrc	time1;
    vTimeStrc	time2;
    float	unk;
    DWORD	ModelID;
    DWORD	ModelID2;
    DWORD	weapon_slot;
    DWORD	Flags <format=hex>;
};

Structure of VCS version

Total number of records: 40

typedef struct vFireOffset{
    float       f1;
    float       f2;  
    float       f3;        
};

typedef struct weapondata{
    DWORD       dwType; 
    int         iFireType;
    float       fRange;
    int         iFiringRate;
    int         iReload;
    int         iAmountOfAmmunition;
    int         iDamage;
    float       fSpeed;
    float       fRadius;
    float       fLifeSpan;
    float       fSpread;
    DWORD       dwPadding;   //padding (0xAA)
    vFireOffset m_vFireOffset;  //vector
    DWORD       _f3C;   //always zero
    DWORD       _f40;   //integer value
    DWORD       _f44;   //DWORD ? unknown
    vFireOffset m_vFireOffset;  //vector
    vFireOffset m_vFireOffset;  //vector
    DWORD       dwModelID; 
    DWORD       dwModel2ID;
    DWORD       dwWeaponSlot
    DWORD       _f6C;   //padding (0xAA)      
};