This is the specifications for the archive file which is handled by the Game Extractor plugin Archive_ART.

Endian Order:Little Endian
Compression:explode
Encryption:None


This format is used by the following Games:
Requiem: Avenging Angel *.art


This is the format specification information:
 
// DETAILS AND FILE DATA
  // for each file
    4 - Decompressed Length
    4 - null
    4 - Compressed Length (including this field)
    X - Compressed File Data (Explode Compression)
    
    when decompressed {
      2 - Image Width
      2 - Image Height
      
      if the image is animated{
        2 - Animation Image Width
        2 - Animation Image Height
        2 - Unknown Width?
        2 - Unknown Height?
        1 - Number of Frames
        1 - Unknown
      }
      else {
        8 - null
        2 - Number of Colors (256)
        }
      2 - Unknown
      1 - Image Format (0=Paletted, 96=ABGR4444)
      1 - Unknown (254)
    
      // for each color
        4 - BGRA color
        
      // for each pixel
        1 - Palette Index
      }


These are the accompanying notes and further information:
 
Each image has the color palette section, even if it's not a paletted image


Game Extractor is able to read files of this type, as well as files from thousands of other games. To give it a try, download Game Extractor (Basic Version) for free, and see what it can do.

For further information on this format, refer to the source code on our GitHub repository.