Extract and create DDRA archives
pip install tqdm
python arc_extract.py file.arc [file2.arc]
python arc_create.py folder file.arc
python arc_extract_to_dal.py file.arc [file2.arc]
Converting .arc to .dal (or .inc) enables the game to read files in folders directly without repacking .arc files. Note that hex editing the respective gamemdx.dll string file.arc -> file.dal is required.
Credit and thanks to nibs for this discovery!