Enter the world of hackers where Hiro and Misa must uncover the circumstances behind a mystery arson attack on a company that may be tied to the legendary hacker "Warlock". What will they uncover in their pursuit of the truth? A visual novel that brings the world of hackers to life!
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Release Date:
Aug 24, 2018

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Buy CyberRebeat -The Fifth Domain of Warfare-


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September 1, 2018

CTF Online Event Details!

Details for the CTF (Capture The Flag) online event are now live!
Information available in

Information & Date
Online Jeopardy-style
Date: September 08, 06:00 - September 09, 06:00 UTC
Competition Timeframe: 24 Hours
Languages: Japanese, English

What's CyberRebeatCTF?
CyberRebeat is the name of a novel game created by doujin circle, E.N.Nach.
The game focuses on the topics of cybersecurity, hackers and CTF.
The rarity of these subjects alongside the high quality of the game itself netted many awards in Japan.
To celebrate the launching of the English version of CyberRebeat on Steam, this event was organized to get people interested in CTF.

What's CTF?
CTF (Capture The Flag) is a type of competition that utilizes the techniques and knowledge of information security.
There are many varieties of CTF but this event will be a Jeopardy-style CTF (ie. question-based) competition.
For more detailed information, check out the entry on Wikipedia.

Q. How will the quality and management of the CTF competition work? Will it be a true to form simulation? Also, what is the difficulty level?
A. CyberRebeatCTF will be run with the cooperation and guidance of Active Defense Institute, Ltd. and Aqutras Inc.
They will be running the score sever as well as aid in the creation of the questions.
The questions will range in difficulty so that everyone from non-engineers to experienced CTF participants can enjoy it.

Q. Will there be any disadvantages if you haven't played the game this is based on?
A. No. The contents of the questions will be no different from standard CTF.
However, unrelated to the answers, there will be questions like for example, a Stegano problem that may use images from the game.
This is the level of collaboration we will have regarding the CyberRebeat game itself.

You can register now through the official website listed above if you’re interested in participating in the event.

Be sure to pick up CyberRebeat -The Fifth Domain of Warfare- on steam if you haven't already! There's a demo available on Steam that you can give a try before buying if you'd like.

Follow the official Twitter for the latest updates on this event!
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About This Game


I don't know of a time without the internet.
Ever since we were born, we've had the net;
the world being connected was simply a matter of fact.

I've never once questioned why keyboards are arranged in QWERTY.
Neither have I wondered how to use a mouse.
Social media feels far more comfortable than a telephone does.

The world is always connected.
The world is always open.

In the sea of the net, colored by a prism,
they looked up at the sky and declared:

― We are hackers ―


Hacking: what other word could be so divisive between society's impressions and the actuality?

The word brings to mind someone furiously typing against a black and white screen, trying to infiltrate the Pentagon.
On the other hand, you have the news reporting information leaks and cyber attacks on a near-constant basis.

So what exactly are hackers, as well as crackers?
As opposed to days long past, where one would attach a virus to an email, how would today's "hacking" compare?

A hacker in the game says:
"The way we see it, this world is so full of holes, it's downright scary."

Nowadays, you could connect to the net with just about any PC out there,
and with just a measly 10 dollars, you can get your hands on some hacking tools and manuals.
The game begins with a hacking contest, "CTF", and shows a slice of their own worlds.


There once was a legendary hacker named "Warlock".
Hiro, who lives his life in a net cafe, is inspired to look into that hacker.

However, as he continues his investigation, a fatal fire accident breaks out at an editorial company -- his source of information.
As he probes further, he finds logs that show that the company's systems were hacked into.

He decides to team up with Misa, another hacker with the same skills as Warlock, as they delve deeper into the incident.


  • Play in English or Japanese
  • Kinetic novel - No choices
  • CG gallery that unlocks upon completion
  • Scenario by Earu
  • Character illustration by Kikyo Manose
  • Beautiful in game music
  • Background/Design by Tetchen

System Requirements

Mac OS X
    • OS: Windows Vista and above
    • Memory: 1 GB RAM
    • Graphics: 1024 x 576 resolution
    • Storage: 800 MB available space
    • OS: OS X and above
    • Memory: 1 GB RAM
    • Graphics: 1024 x 576 resolution
    • Storage: 810 MB available space

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