Grey Hack is a massively multiplayer hacking simulator game. You're a hacker with full freedom to act as you want on a vast network of computers procedurally created. The interface of the game is similar to a current desktop operating system. The file explorer, the command terminal or text editor are some of the programs that will be available from the start of the game. In Grey Hack, terminal has a fundamental role, it is also based on actual unix commands and will be an indispensable tool to perform successfully hacking actions. Source: The Game Website.