Byakhee CoC Character Generator

Byakhee Logo

Byakhee is an investigator generator for the role playing game Call of Cthulhu. In addition to generating investigators, it also prints out character sheets and player handouts.

Other Call of Cthulhu Character software

Another app is a character creation and management system for your ipad. Note that this is not something I wrote, just another program that might be useful.


  • Fully scriptable investigator sheets and handouts.

  • WYSIWYG interface.

  • In-place editing.

  • Investigator wizards help to create instant investigators.

  • Select any GIF, JPEG, PNG or Bitmap file to use as a portrait.

  • Export to HTML.

  • External skill, occupation, sheet and weapon lists - create your own rule packs with ease.

Investigator Wizard


Main Downloads

Byakhee 3.03 (306K)
This comes with the Call of Cthulhu 5.0 rule pack and investigator sheet, a small NPC investigator sheet and a telegram handout. It also contains the greater and lesser spell books from the v5.0 rulebook. Now includes the back of the sheet too. (Also available as a separate download, below)

This version should now work with accented characters, such as "ñ" etc. You can now send handouts via e-mail from the file menu, and HTML export has been updated to include Cthulhu 5.5 support.

These days, for pictures there's a lot of options out there. Google image search is your friend, or you could use to find good pictures for the 20's and 30's, or go with to create modern characters.

Additional Character Sheets

To use a character sheet, unzip it into the same folder where you unzipped Byakhee. After it has been unzipped, it can be selected from the drop-down list box on the Byakhee toolbar.

Sheet Back for Call of Cthulhu (2K)
This is the long-awaited second page of the standard Call of Cthulhu investigator sheet.

Sheet Back for Delta Green
Second page of the Delta Green character sheet.

Additional Rule Packs

To use a rule pack, simply unzip it into the same folder where you unzipped Byakhee. After it has been unzipped, you should be able to start using the new rule pack immediately.

Call of Cthulhu 6.0 Rulebook
Updated character creation for 6.0 - mostly minimum 1% skills.

Call of Cthulhu 5.5 Rulebook
New skills and a new character sheet.

Walker in the Wastes
New skills.

1930's Antarctic Explorer (from Beyond The Mountains of Madness)
New skills and occupations.

Delta Green
New skills, occupations, weapons and a new sheet. You may also want thedroid font, below.

1920s Investigator Companion
New skills and occupations.

New skills, occupations, weapons and a new spellbook. Currently missing.

Loads of Rulebooks
New skills, weapons and loads of occupations.

Additional Handouts

To use a handout, simply unzip it into the same folder where you unzipped Byakhee. After it has been unzipped, select "new" from the menu (or toolbar) and click on the "handout" tab. Select the handout to create.

Calendar Set 1
Two yearly calendars, one with Sundays highlighted in red.

Newspaper Clippings Set 1
Two newspaper clipping handouts - one wide, one tall.

Additional Scripts

To use a script, simply unzip it into the same folder where you unzipped Byakhee. After it has been unzipped, select "new" from the menu (or toolbar) and click on the "script" tab. Select the script to run.

Resistance Roller
This script from Ian Millington calculates the resistance roll.

Other Language Translations

This section contains handouts and rule packs etc. that have been translated into other languages, as well as links to web sites that host tranlsated Byakhee items.

Xavier Belanger's page had a few French translations, but his site seems to have disappeared.

French Translation of the main Byakhee data files.
Castel has translated most of Byakhee's core data files into French. You'll still need the main Byakhee zip file, though. Currently missing.

German Translation of some of the sheets [updated]
Axel Sartorius has translated the front and back of the character sheet, the NPC sheet and the lesser and greater spell grimoires. Currently missing.

Spanish Translation of Coc5.5.rul
This newer translation includes support for Byakhee 3's additional features. Currently missing.

Spanish Tranlsation of coc5.rul
Cirtheru has translated the coc5.rul file into Spanish. Currently missing.

Spanish Sheet Translations
Jacinto Quesnel's page had Spanish translations of the main Byakhee sheets, but disappeared with Geocities' demise.

Other Downloads (279K)
The previous version of Byakhee. (version 2.0) (10K)
Droid Font by Ray Larabie. This is almost like the Delta Green font and the Delta Green rule pack will use it automatically if it's installed. (180K)
Italian version of the sheets from Byakhee 2.0 by G.M. (you'll also need (422K)
The source code to the previous version of Byakhee.

These files are provided totally free of charge and is totally unsupported. The author or site host cannot be held responsible for any damage or loss or revenue, etc. caused by the use of this software.

Call of Cthulhu is a registered trade mark of Chaosium Inc.
All images used on the investigator sheet are either © Chaosium Inc. or © the Delta Green Partnership.
Published by arrangement with the Delta Green Partnership. The intellectual property known as Delta Green is ™ and © the Delta Green Partnership, who has licensed its use here. The contents of this document are © David Harvey, excepting those elements that are components of the Delta Green intellectual property.
If any copyright or trademark messages are incorrect, please let me know!

The Cool Byakhee logo was created by Tolga Yanasik [home page]

Byakhee got a rating of 4 Starsfrom ZDNet.

Gratuitous Lovecraft Image

Frequently Asked Questions

Q. How do I create my own rule packs?
A. A more in-depth ByakheeScript programming guide will be released soon. For the moment, use the following quick guide:

  • .RUL files contain the skills, weapons and occupations listings.

  • .BSB files contain lists of spells.

  • .LST files contain a list of options, such as those displayed in the "Art: " drop-down list

  • .BIS files are ByakheeScript programs which draw the investigator sheets and add fields. ByakheeScript is very similar to JavaScript, except that a few features are missing (and it's a bit buggy :-)

Q. Where is the source code to Byakhee 3?
A. The source code to Byakhee can be accesed at

Q. Can I translate Byakhee into another language?
A. It's easy to translate the sheets, handouts and rule packs - just open them in a text editor. Feel free to put them on your web site or whatever once they're done. It's a bit harder to translate the dialogs and messages in the program itself and is beyond the scope of this Q & A.

Known Issues

Byakhee does not function correctly on Windows NT. If the screen resolution is much below 1024x768, the investigator sheet will appear much too small (it will print OK, though). To make matters worse, the cause for this is not known...