Psychonauts PKG

PKG

• Format Type : Archive
  
• Endian Order : Little Endian
  

Format Specifications

// XBOX ONLY
In the xbox version the .pkg file is zlib compressed. There is a 16 byte header then a compressed zlib archive. The format of this header is:

uint32 {4}   - Header (ZLIB)

uint32 {4}   - Version (1)

uint32 {4}   - Size of decompressed file

uint32 {4}   - Size of compressed file (minus the 16 byte header)

// ARCHIVE HEADER

char {4}   - Header (ZPKG)

uint32 {4}   - Version (1)

uint32 {4}   - First File Offset

uint32 {4}   - Number Of Files In Directory 1

uint32 {4}   - Directory 2 Offset

uint32 {4}   - Number Of Records In Directory 2

uint32 {4}   - Filename Directory Offset

uint32 {4}   - Extension Directory Offset

byte {480}   - null Padding to offset 512

// DIRECTORY 1

// for each file in dir 1

byte {1}     - null

uint16 {2}   - File Extension Offset (relative to the start of the Extension Directory)

byte {1}     - null

uint32 {4}   - Filename Offset (relative to the start of the Filename Directory)

uint32 {4}   - File Offset

uint32 {4}   - File Length

// DIRECTORY 2 (Directory structure)

// for each record in dir 2

byte {1}     - One character of a directory name

byte {1}     - null

uint16 {2}   - Unknown (possibly a reference to another record if nonzero)

uint16 {2}   - Unknown (possibly a reference to another record if nonzero)

uint16 {2}   - Record ID (incremental from 1)

uint16 {2}   - Start index (inclusive)

uint16 {2}   - End index (exclusive)

The characters read in each record add up to form a directory name. Start index and and end index are usually zero unless the name is complete. If start index or end index are nonzero, then the directory name is complete and the entries in the file records in the given range belong to the directory name just read. When a new directory name starts with a slash (/), the new name must be appended to the one previously read.
There are a few anomalies, because some directories are missing the first letter(s) of their name.

// FILENAME DIRECTORY

byte {1}     - null

// for each filename

char {X}     - Filename

byte {1}     - null

// EXTENSION DIRECTORY

byte {1}     - null

// for each extension

char {X}     - Extension Name

byte {1}     - null

// FILE DATA

// for each file

byte {X}     - File Data

MultiEx BMS

Not written yet

Supported Programs

• Game Extractor
  
• Psychonauts Explorer