Yes, I can see that it's realistic and fun by reading some of the user reviews, like this one:
> Wow, this was so much fun! I work as a DevOps engineer, studied computer science, and have 20 years of work experience. This game creates several virtual machines when starting, with real operating system on them, real web servers, databases, web applications, and shows you multiple ways of hacking around networks, linux, web, php, passwords, authentication, privilege escalation, SQL injection, and MySQL in general. Everything I did in this game came up during my career in work in some form, and I had to protect systems against attacks like this too.
...there were a few things I learned, for example `sudo -l`, I'm going to use that all the time from now on.
> Wow, this was so much fun! I work as a DevOps engineer, studied computer science, and have 20 years of work experience. This game creates several virtual machines when starting, with real operating system on them, real web servers, databases, web applications, and shows you multiple ways of hacking around networks, linux, web, php, passwords, authentication, privilege escalation, SQL injection, and MySQL in general. Everything I did in this game came up during my career in work in some form, and I had to protect systems against attacks like this too.
...there were a few things I learned, for example `sudo -l`, I'm going to use that all the time from now on.