An open-source Level Editor for Doom 3 and The Dark Mod
DarkRadiant's help/manual pages are embedded within the DarkWiki, the Dark Mod's very own project wiki:
Use OrbWeaver's PPA, or a darkradiant package for Debian, which is usually available after some time in Ubuntu as well.
Download the Flatpak version from Flathub, or search for it in Discover or GNOME Software.
See the Compilation Guide on our Wiki to build DarkRadiant fresh from its sources.