PAK (File Format)/Vicarious Visions

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PAK is a container file format used in games developed by Vicarious Visions, such as Marvel Ultimate Alliance 2, Crash Bandicoot N. Sane Trilogy and Crash Team Racing Nitro-Fueled.

File Format

The file byte order is always little endian.

Header

Offset	Type	Description
0x00	Char[4]	File magic. Always IGA\u001A.
0x04	UInt32	File version.
0x08	UInt32	Unknown.
0x0C	UInt32	Number of file entries.
0x10	UInt32	Size of compressed data chunks in bytes.
0x14	UInt32	Unknown.
0x18	UInt32	Unknown.
0x1C	UInt32	Unknown.
0x20	UInt32	Size of table 1 in bytes.
0x24	UInt32	Size of table 2 in bytes.
0x28	UInt32	String table offset. Points to an array of UInt32s, which points to null-terminated strings.
0x2C	UInt32	Unknown.
0x30	UInt32	Unknown.
0x34	UInt32	Unknown.

Hash List

After the header comes a hash list of the files. Presumably these are hashes of the filename, since the file entries are sorted by this hash. Each entry is a 32-bit value.

File Entry

The hash list follows by an array of file entries. Each entry has the following structure:

Offset	Type	Description
0x00	UInt32	File data offset.
0x04	UInt32	Ordinal.
0x08	UInt32	File data size.
0x0C	UInt32	Flag. 0xFFFFFFFF means it's not compressed. xxAx xxxx xxxx xxxx xxxx xxxx xxxx xxxx. A: Compression method. Deflate = 0, LZMA = 1

Tools

The following tools can handle PAK files:

• (none)