Hello, I have a port of GtkRadiant lying around that I quickly knocked up during my dissertation. If anyone has interest in this it can be found at:-
http://devio.us/~kpedersen/ports/gtkradiant.tar.gz Much of it was copied from the FreeBSD port but there were a few tweaks needed for OpenBSD. (namely /usr/X11R6 stuff) Feel free to report back any bugs and I will try to fix them. Best Regards, Karsten