Let's say, just for argument's sake, that you happen upon a hacked version of a PC game and run installer.exe. To the plonky sounds of synth music you might read, "Tony Hawk Pro Skater 4 (c) Aspyr. Enjoy another nice game from your friends at Class."
After that, you open the accompanying .nfo text file. Beneath an ASCII art graphic, you read details about how the game was ripped, and a 'help wanted' section, seeking partners in crime like suppliers, distributors, and the elite of videogame lawbreakers: crackers.
Back in the day, cracker groups were borderline famous.