Spore EP1 Steganography Encoder/Decoder in Python

This is an implementation of the steganography algorithm, which is used by Spore EP1 (Spore: Galactic Adventures) to store large amounts of additional data in .PNG files alongside thumbnails. In the vanilla EP1 expansion pack, this method is only used for scenarios (adventures), but every other asset type can be imported in this way.

Both encoding and decoding are supported.

How to use

You must use Python 3.10 or newer.

Clone the repository and install the requirements:

git clone https://github.com/Spore-Community/Spore_EP1Stegano-Python.git
cd Spore_EP1Stegano-Python
pip install -r requirements.txt

Here are examples of usage in the terminal:

Encode	Decode
python spore_ep1stegano.py encode C:\thumb.png C:\stegano.bin	python spore_ep1stegano.py decode C:\adventure.png

There is also a list of additional arguments:

Encode	Decode
--output_png_path *path*	--output_stegano_path *path*
--no_zopfli	--no_validation