README:

This project, written in 2016 for the cc65 compiler, is a simple Commodore 64 VIC-II text mode clone of a popular hacking mini-game. It was written to be the centrepiece of an escape room where the players had to restore power to a damaged operations centre.

The software originally made use of semaphore files to signal to the escape room hardware (switches, LED’s, sounds, music, etc) that various events happened. These bits of code have been commented out.

All of the C code written here is 100% from scratch and has been released into the public domain for all to enjoy and learn from.

You can download Hack405 here. Be aware that it is public domain hackerware. It is unmaintained and there is no support.