: A hidden message appeared on the wall, providing the username and password needed to access Level 5. Legacy of g4.zip
The name "g4.zip" was a hint hidden within the page's source code. Players who figured this out were directed to a downloadable file containing a picture of a . The "informative story" hidden in this level is actually a lesson in steganography —the art of hiding information within other data. How the Puzzle Worked g4.zip
To this day, Notpron remains active on the official Notpron website , where "g4.zip" continues to stump and then enlighten new players. : A hidden message appeared on the wall,
: Upon opening the image inside the zip file, the hallway looked empty. However, the true clue was only visible by brightening the image using a photo editor. The "informative story" hidden in this level is
: Realizing that what you see on a screen is just a collection of data that can be manipulated.
: Changing the address bar to navigate "forbidden" directories.
