To uninstall darkplaces-server just follow these instructions.
sudo apt-get remove darkplaces-server
This will remove just the darkplaces-server package itself.
sudo apt-get remove --auto-remove darkplaces-server
This will remove the darkplaces-server package and any other dependant packages which are no longer needed.
If you also want to delete your local/config files for darkplaces-server then this will work.
sudo apt-get purge darkplaces-server
Or similarly, like this darkplaces-server
sudo apt-get purge --auto-remove darkplaces-server
|Maintainer||Debian Games Team <firstname.lastname@example.org>|
|Description||Standalone server for Quake-based games improved visual effects and lighting and many features for mods. It can be used to play various games based on the Quake engine, such as Xonotic, Nexuiz Classic, OpenQuartz, and Quake itself.|