GtkRadiant is the official level design toolchain for games powered by id Tech engines from id Software, and is maintained by a community of volunteers. GtkRadiant is powered by the GTK+ Project and released under a GPL license.
GtkRadiant is on GitHub where it can be easily forked and modified to suit the specific and advanced needs of development teams, submit a pull request for a patch, or report an issue.
GtkRadiant runs on Windows, Mac and Linux platforms. It supports a number of games powered by id Tech engines, supporting both commercial developers and individual modders.
By the community, for the community. GtkRadiant is developed and tested by volunteers, and offers a number of community support options populated by like-minded game developers.
This project is about providing a reliable reference implementation of GtkRadiant. We want level designers to come to this site and download the latest build with the assurance that they will get a stable and familiar tool to work with. We may unify some of the 1.4 and 1.5 features and tweak some aspects of the functionality, but we are not planning to write major new systems.
In order to release builds at the quality level we aim for, we need active users giving feedback, and programmers with knowledge on the specific game. We will only support the games that meet those criterions. We will consider support for new games 'as needed' if we have mappers for those games interested in testing and programmers interested in helping.
Some teams out there do some pretty advanced stuff based on idTech3. They have specific, advanced needs that the main release of GtkRadiant isn't going to meet. So we are putting all the code on github where it can easily be forked and modified.
We recognize that some designers will still prefer the GtkRadiant 1.4 and 1.5 releases they are used to. We will keep those old builds around on this website if you need them.