Fate/Extra (original Japanese name — フェイト/エクストラ) is an RPG game that takes place in a parallel universe to the visual novel Fate/stay night. It was developed by Imageepoch and Type-Moon for PSP and released in 2010.
A companion game called Fate/Extra CCC was released in 2013.
The process is explained on the CPK page.
The .PAK archives mostly contain models. In order to extract them you should use this QuickBMS script:
get FILES short get UNKNOWN short for f = 0 < FILES get TMP long putarray 0 f TMP next f padding 16 for f = 0 < FILES getdstring NAME 64 savepos POS getarray SIZE 0 f log NAME POS SIZE math POS += SIZE goto POS next f
Script created by WRS, taken from here
Just copy the code above to a Notepad and save it as .bms file.
One of the ways to convert the .AT3 is to use the at3tool. It was left by the developers in the sound\bgm\decode folder of Fate/Extra CCC main archive.
Use this to convert .AT3 to .WAV:
at3tool.exe -d input_file.at3 output_file.wav
VG Resource Pages
- Fate/Extra CCC