darkradiant software package provides Level design toolchain for DOOM3 and The Dark Mod, you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install darkradiant
darkradiant is installed in your system.
Make ensure the darkradiant package were installed using the commands given below,
$ sudo dpkg-query -l | grep darkradiant *
You will get with darkradiant package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Graphics |
| Package | darkradiant |
| Version | 2.0.4-1+b1 |
| Description | Level design toolchain for DOOM3 and The Dark Mod |
| Sub Section | Graphics |