The PAK file format stores uncompressed files in a table. It usually ends with the .pak file extension. It was introduced by id Software with Quake (1996).

NOTE: The values here are assumed to be in little-endian byte order.

Header

Offset	Size	Description
0x00	4	Magic identifier (PACK in ASCII)
0x04	4	Offset to the file table from the start of the file
0x08	4	Number of entries in the file table

File Table Entry

Offset	Size	Description
0x00	56	File name and path in ASCII
0x38	4	Offset to the file data from the start of the PAK file
0x3C	4	Size of the file data in bytes

HROT

HROT (2023) also uses the PAK format, but slightly modified. The magic identifier is HROT in ASCII, and the file table entry structure looks like this:

Offset	Size	Description
0x00	120	File name and path in ASCII
0x78	4	Offset to the data from the start of the file
0x7C	4	Size of the data in bytes