Use a hex editor (HxD on Windows, Hex Fiend on macOS, xxd on Linux) to inspect the file signature.

It is critical to note that the original "clone" version of Sad Satan was linked to a creator who was later arrested for the possession of illegal material. Searching for or downloading original game files from unverified sources carries a high risk of:

For researchers: preserving the original as evidence is fine, but do not attempt to “repair” it inside a production OS. Use a dedicated analysis VM.

Even if a file is labeled "g5jpg fixed," you should be extremely cautious. These files are often hosted on unverified archive sites and can still contain Psychological Impact:

— A recovered log from a corrupted deep-web art installation, 2019