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 - offset_block_list 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)

offset_block_list:

• 4 bytes - uint32 absolute offset array of the offsets_blocks terminated by -1 (FF FF FF FF)

offset_block_1: # first offsets block describing data block 1 partitioning

• 4 bytes - int32 absolute array of offsets in the data block terminated by -1 (FF FF FF FF). The first offset is the data block offset

data_block_1:

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

offset_block_2: ... data_block_2: ...

data_block contains int16 indexes relative to the tpl symbol list. First symbol in the tpl has number 0 then horizontaly symbol 1, 2 ... So data block contains phrases.

• FFFE: space
• 1001: end of the phrase

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