MDT (Gotcha Force)

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This section is currently being written.

More research is needed and some paragraphs may be wrong.

MDT files are similar to PZZ files, with a header of 0x800 / 2048 bytes including :

• the number of files (uint32 big endian)
• the file size / 0x800 for each file

It is possible to unpack and repack .mdt files with the pzztool.py tool. Unlike pzz, the internal files of .mdt are packaged and not compressed.

• 000 dat file contains at first sight all texts of the game (Related to all dat file, not only one).
• 001 TPL including an alphanumeric alphabet used by the dat file

dat file header:

• 4 bytes - block 1 offset
• 4 bytes - symbols_count # number of symbols contained in the tpl
• 2 bytes - offsets for each symbol - in the file relative to after the header (array)

dat file block 1:

• 4 bytes - offset of block 2
• 4 bytes - -1 (FF FF FF FF)

dat file block 2:

• 4 bytes - array of signed int16 offsets absolute terminated by -1 (FF FF FF FF) The first offset is the block 3 offset

dat file block 3:

• 4 bytes - block 3 offset
• 4 bytes - uint32 - list of offsets relative to this file ?

dat file block 4:

• 2 bytes - signed int16 list <- block 2 describe where each element begin

Virtual World RE has developed the python script pzztool.py to manipulate MDT files and their internal files.

PGCD of MDT file sizes: 2048 / 0x800