File Formats

File Formats

Pages marked with ✓ next to them have had the known extent of their file structure fully documented.

Wiki Page	Extensions	Description
KifintArchive ✓	.int	Archives for all CatSystem2 files of a specific type
HgxImage	.hg2, .hg3	Images with position info and multiple frames
Animation ✓	.anm	Animation script for Images with multiple frames
SceneScript ✓	.cst	Message scene script
ScreenScript ✓	.fes	Screen/menu script
ZtPackage ✓	.zt	Packaged files that can be exported from in-game

Data Types

These are the data types present when explaining file specifications.

Although most types are listed as uint32 in File Specifications, the TriggersTools.CatSystem2 C# implementation often uses int32 values instead to avoid unnecessary casting or unchecked blocks.

Type	Size
byte	1-byte unsigned integer
uint16	2-byte unsigned integer
uint32	4-byte unsigned integer
uint64	8-byte unsigned integer
int16	2-byte signed integer
int32	4-byte signed integer
int64	8-byte signed integer
bool32	4-byte boolean (0 or 1)
byte[n]	Array of n bytes
char[n]	String of n bytes of characters
string	Null-terminated string

Important Notes

• All integer types are read in little-endian format.
• All string and char[n] types are read with Shift JIS (Codepage 932) encoding.
• The char[n] type uses null characters as padding, so this type is essentially null terminated as well unless there are n bytes of non-null characters.
• All compression is done with Zlib unless otherwise specified.