Surreal Software Archive (Riot Engine)

ADU CDU FDU LDU MDU ODU QDU SDU TDU VDU WDU XDU RRC

• Format Type : Archive
  
• Endian Order : Little Endian
  

Format Specifications (The Suffering, version 1.1)

// ARCHIVE HEADER

char {4}     - Header (SRSC)

byte {2}     - Version (1,1)

uint32 {4}   - Files Directory Offset

uint32 {4}   - Number Of Files [-1]

// FILE DATA

// for each file

byte {X}     - File Data

// FILES DIRECTORY

uint32 {4}   - Unknown (1026)

uint16 {2}   - null

uint32 {4}   - File Data Length

uint32 {4}   - Unknown (10)

// for each file (14 bytes per entry)

uint32 {4}   - Unknown

uint16 {2}   - File Type ID?

uint32 {4}   - File Offset

uint32 {4}   - File Size

Format Specifications (Drakan, version 0.1)

// Drakan
// RRC file format

// little endian

// header
4 bytes (char) - magic // "SRSC"
2 bytes - version  // 0x00 0x01
4 bytes (uint32) - directory offset
2 bytes (uint16) - number of files


// data
number_of_files *
{
   x bytes - file data
}


// directory
number_of_files *
{
   2 bytes (uint16) - file type  // "0x40 0x00" (64) - texture data
                                 // "0x00 0x04" (1024) - encrypted text
                                 // "0x01 0x04" (1025) - plain text
                                 // etc. etc.
   2 bytes (uint16) - file ID
   2 bytes (uint16) - group ID
   4 bytes (uint32) - file offset
   4 bytes (uint32) - file size
}

MultiEx BMS

Not written yet.

QuickBMS

• drakan.bms

Notes and Comments

• This is archive file format used by the Riot Engine by Surreal Software company.
• Some files inside archive may be compressed with ZLIB compression.

Decryption Method

Strings are encrypted with custom XOR algorithm.
Below is Python implementation of decryption method:

def decrypt_data(in_data_str, in_data_len):   
    key = 0x5FDD390D
    out_data = b''
    for i in range(in_data_len):
        out_data += xore(struct.pack("B", in_data_str[i]) , struct.pack("B", key & 0xFF))
        key = (key<<3) | (key>>(32-3))
        
    return out_data

Games

List of games using this file format:

• Drakan: Order of the Flame
• Drakan: The Ancients' Gates
• The Lord of the Rings: The Fellowship of the Ring (needs confirmation!)
• The Suffering
• The Suffering: Ties That Bind
• Gunslinger (cancelled game) (needs confirmation!)
• The Lord of the Rings: The Treason of Isengard (cancelled game) (needs confirmation!)

Supported Programs

• Game Extractor
  
• opendrakan
• Drakan: Order Of The Flame Level Editor
• Drakan_RRC_Tool.py