Survival Project

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Choose archive extension:

IDX + PAK


Format Specifications

// IDX FILE

char {8}     - Header (200472 + null x2)
uint32 {4}   - Unknown
uint32 {4}   - Unknown
uint32 {4}   - Unknown
uint32 {4}   - Unknown
uint32 {4}   - Unknown (1026)
uint16 {2}   - Number Of Files
uint32 {4}   - Index File Length
uint32 {4}   - Number Of Files


// for each file
uint32 {4}   - Unknown
char {255}   - Filename (null Terminated, filled with junk)
uint32 {4}   - File Length
uint32 {4}   - File Offset



// PAK FILE

char {8}     - Header (200472 + null x2)
uint32 {4}   - Unknown
uint32 {4}   - Unknown
uint32 {4}   - Unknown
uint32 {4}   - Unknown
uint32 {4}   - Unknown
uint16 {2}   - Number Of Files
uint32 {4}   - Archive File Length
uint32 {4}   - Number Of Files


// for each file
byte {X}     - File Data

MultiEx BMS

  • Processed by MexCom plugin.

Notes and Comments

The *.idx file contains the directory, the *.pak file contains the file data
Images.pak contains .PGF files, a relatively new graphics format. Headers seem to be stripped from these files.

Supported Programs