I was ripping the files of a quite unknown erogame called "custom girl purupurupu-ru"and when it came to the models and other 3D assets, all of them were in file types I've never heard of before.
The main parts are in ".xb2", while the others are in ".ig". I couldn't find anything about them...
@Xdqwerty good. thats great fma takes more time to to build up the beginning. brotherhood rushed the beginnign because the beginning had already been told