DAT Format (Mystic Towers)

From ModdingWiki
Jump to: navigation, search
DAT Format (Mystic Towers)
Format typeArchive
Max files65,535
File Allocation Table (FAT)End
Filenames?Yes, 8.3
Supports compression?No
Supports encryption?No
Supports subdirectories?No
Hidden data?Yes

The DAT Format is used by Mystic Towers for storing most of the game data.

File format


There is no signature, but the file has certain fields that can be checked for validity. For example all the offsets could be read in the FAT to ensure none of the files appear to have data beyond the end of the archive file itself.


The very last two bytes in the file are a UINT16LE called numFiles. The FAT begins (offFAT) at the 2 + numFiles * 21 bytes from the end of the file.

File entry

At offFAT, the following structure is repeated numFiles times.

Data type Name Description
UINT8 lenFilename Length of valid chars in filename field
char[12] filename Filename, padded to 12 chars with arbitrary values. Only first lenFilename chars are valid.
UINT32LE offset File offset, relative to start of file
UINT32LE size File size

Hidden data

It's possible to "hide" data between the last file and the start of the FAT. This data wouldn't be accessible by filename but the game would load the other files as per normal.


The following tools are able to work with files in this format.

Name PlatformExtract files? Decompress on extract? Create new? Modify? Compress on insert? Access hidden data? Edit metadata? Notes
Camoto Linux/WindowsYesN/AYesYesN/ANoN/A


This file format was reverse engineered by Malvineous. If you find this information helpful in a project you're working on, please give credit where credit is due. (A link back to this wiki would be nice too!)