attal-themes-medieval software package provides medieval theme for attal, 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 attal-themes-medieval
attal-themes-medieval is installed in your system.
Make ensure the attal-themes-medieval package were installed using the commands given below,
$ sudo dpkg-query -l | grep attal-themes-medieval *
You will get with attal-themes-medieval package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Games |
| Package | attal-themes-medieval |
| Version | 1.0~rc2.dfsg1-1 |
| Description | medieval theme for attal |
| Sub Section | Games |