File Formats

File Formats used by each version of the game.

General

	AC	SW	ST	APP
Chart List	stage_param.dat	stage_param.dat	TableTune.aar	???
Charts	.dat	.dat.gz	.dat	.dat (in .zip)
Audio	.wav	.wav.opus (LOPUS)	.ogg / .asn	.ogg (in .zip)
Jackets	.dds	.dds ( in .bntx)	.atx	???
Chart Directory	data/stage/	romfs/stage/	Data/Stage00###.aar	data/ios/gc2/stage
SE / Menu / Voice	data/sound/	romfs/sound/	???	Se.aar / Navi00*.aar
Internal Config	data/ + data/task_cfg	romfs/config/	Data/GameReg.xml	???
Uses SHOT*	TRUE	FALSE	TRUE	TRUE

*SHOT is an extra audio layer along side BGM that will be temporarly muted when missing notes.

All

File Type	Description
.tumo	3D models(?)
.cfg	Internal game settings.
.csv	[???]

AC + SW

File Type	Description
boot/stage_param.dat	List of all songs in the game, along with links to .dat files.
BGMList.csv	File names of menu music.

AC

File Type	Description
data/movie/.wmv	Set of 3 unused(?) movie files
img*.bin	PNG image files. Rename them to .png and they will open.
.mtf	[list of fonts???]
.mfi	[font files???]

SW

File Type	Description
.opus	Actually .lopus, which is OPUS audio without the header.

ST

Groove Coaster for Steam uses Aqualead as its engine.

NOTE: all files are compressed with ALLZ. Run Aqualead LZSS Decoder to remove it.

File Type	Description
.aar	Collection of files packed together (not compressed).
.atx	Collection(?) of DDS images with a modified header.
.asn	OGG audio files with a modified header. Remove the first 20 bytes and it will work as a standard .ogg file.
.aod	[Game engine stuff?]
.aft	.atx files(?). Only found in Font.aar.
[...].cfg	Internal game settings

Mod The Coaster ♡ lemocha 2024