IGZ (File Format)
IGZ is a file format used in games developed by Vicarious Visions, such as Marvel Ultimate Alliance 2, Crash Bandicoot N. Sane Trilogy and Crash Team Racing Nitro-Fueled.
File Format
The file byte order is always little endian.
Header
| Offset | Type | Description |
|---|---|---|
| 0x00 | Byte | Unknown. Always 1. Probably part of the magic. |
| 0x01 | Char[3] | File magic Always ZGI in ASCII. |
| 0x04 | UInt32 | File version. |
| 0x08 | UInt32 | Unknown. Probably a hash. |
| 0x0C | UInt32 | Unknown. |
| 0x10 | UInt32 | Number of data blocks. |
| 0x14 | UInt32 | Unknown. |
| 0x18 | UInt32 | Possible first block offset. |
| 0x1C | UInt32 | Unknown. |
| 0x20 | UInt32 | Same as 0x18. |
| 0x24 | UInt32 | Unknown. |
| 0x28 | UInt32 | Offset to mesh structure? |
| 0x2C | UInt32 | Unknown. |
| 0x30 | UInt32 | Unknown. |
| 0x34 | UInt32 | Unknown. |
| 0x38 | UInt32 | Buffer data offset. |
| 0x3C | UInt32 | Buffer data offset. |
| 0x40 | UInt32 | Unknown. |
After the header there are many null bytes, and at 0x224, there are two strings following each other. How this data is handled is unknown.
Block Header
Each block starts with the following header:
| Offset | Type | Description |
|---|---|---|
| 0x00 | Char[4] | Section magic. |
| 0x04 | UInt32 | Number of entries stored in the section. |
| 0x08 | UInt32 | Size of this section in bytes. |
| 0x0C | UInt32 | Size of this section header in bytes. |
TDEP
The TDEP section stores unknown pair strings.
TSTR
The TSTR section stores unknown strings.
TMET
The TMET section stores unknown strings.
MTSZ
The MTSZ section stores unknown data. Each entry consists of a UInt32.
EXID
The EXID section stores unknown data. Each entry has the following structure:
| Offset | Type | Description |
|---|---|---|
| 0x00 | UInt32 | Unknown. |
| 0x04 | UInt32 | Unknown. |
EXNM
The EXNM section stores unknown data. Each entry has the following structure:
| Offset | Type | Description |
|---|---|---|
| 0x00 | UInt32 | Unknown. |
| 0x04 | UInt32 | Unknown. |
RVTB
The RVTB section stores unknown data. Each entry consists of a byte.
RSTT
The RSTT section stores unknown data. Each entry consists of a byte.
ROFS
The ROFS section stores unknown data. Each entry consists of a byte.
RPID
The RPID section stores unknown data. Each entry consists of a byte.
REXT
RHND
The RHND section stores unknown data. Each entry has the following structure:
| Offset | Type | Description |
|---|---|---|
| 0x00 | UInt32 | Unknown. |
| 0x04 | UInt32 | Unknown. |
ROOT
The ROOT section stores unknown data. Each entry consists of a UInt32.
ONAM
The ONAM section stores unknown data. Each entry consists of a UInt32.
Tools
The following tools can handle IGZ files:
- (none)
