KallistiOS: Intro


KallistiOS is a pro-grade development system for consoles. There existed ports to the Dreamcast™, Gameboy Advance™, Playstation 2™, and x86-based PCs, though the Dreamcast port is the only one that can claim any sort of completeness (or even existence) right now, so pretty much all the rest of these web pages are devoted to the Dreamcast port.

The GBA port was based on an older version (1.2.x) and was forked off to be maintained by Gil Megidish. A link to that project will be posted if/when I've got it.

KOS has been used to produce multiple commercial quality games for sale.

KOS was developed from scratch over the internet by a group of free software developers, and has no relation to the old Katana or WinCE development kits for the DC (besides having a similar purpose anyway). It also has no relation at all with the unfortunately named "Kalisto" crack group.

KOS is free software. This means you get the full source code for it and can do whatever the heck you want with it except for incorporating it into your own program without credit. As long as you have those magic credit lines somewhere in your program, you are free to include it in any other free software project (GPL'd or otherwise), commercial project, whatever you want.

On the other hand, KOS comes with NO WARRANTY. If you use it, you use it at your own risk. Check out the source license for more details. Also please be aware that KOS is bundled with various "ports" which may have different licenses (e.g., GPL). If you use those libraries, please check the license to make sure.


These web pages have been organized into sections by topic to make it easier to find what you want. People who are new to DC homebrew development should start at the top. Otherwise you probably know where you need to start.

  • The DC "Scene": Just heard about this "DC Scene" thing and want to know what it's all about and why you might be interested in joining it?
  • How to get it: This tells where and how you can find KOS for download.
  • Compilation/Setup: This tells the basics of going from a set of downloaded files to a working DC dev setup using KOS. Note that if you haven't downloaded anything yet and want to use an automated setup script, you can start here.
  • FAQ: Frequently asked questions by both new and experienced developers. Check here if you're having troubles.
  • Mailing lists/Forums: If you're going to use KOS for more than a hard disk ornament, please join the KOS mailing list. It's generally very friendly (especially to beginners) and is definitely the quickest way to get help (generally even faster than mailing me). Plus there's a wide variety of people on these that can help with a lot of different topics.

Gamedev Home


The "Scene"
Documentation (v2.0.0)

Hosted by:
SourceForge.net Logo

Cryptic Allusion Game Dev © 2002,2003,2004 Dan Potter (design and information); © 2010-2016 Lawrence Sebald (information only); please see About CA Game Dev for further trademark and copyright info. This site has nothing to do with game mods, piracy, or other illegal or potentially illegal activities. It also has no relation whatsoever to SEGA, Ltd. It is intended strictly for the use of homebrew developers.