GameMaker DAT WIN

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DAT, WIN

• Format Type : Archive
  
• Endian Order : Little Endian
  
• Signature : FORM
  

Format Specifications

//header
4 bytes (char) - signature // "FORM"
4 bytes (uint32) - chunk size / archive size

num_of_chunks *
{
   4 bytes (char) - chunk name  // e.g. "AUDO"
   4 bytes (uint32) - chunk name
   x bytes - unknown
   x bytes - data
}

Notes and Comments

• This file format occues in games made using GameMaker Studio.
• This file format supports several chunk types: AUDO, GEN8, OPTN, EXTN, SOND, SPRT, BGND, PATH, SCPT, FONT, TMLN, OBJT, ROOM, DAFL, TPAG, CODE, VARI, FUNC, STRG, TXTR.
• Filename of the archive is often data.win or gamedata.dat.

Games

List of games using this file format:

• Arietta of Spirits (*.DAT / *.WIN)
• Deltarune
• Fran Bow
• Memoranda
• Risk Of Rain
• Rock God Tycoon (*.WIN)
• Undertale
• Valdis Story: Abyssal City

QuickBMS Script

• yoyogames.bms

Compatible Programs

• Altar.NET
• GM Editor
• UndertaleModTool (supports many games)
• UndertaleTools

See Also

• File format notes (Github)