cyphesis-cpp software package provides WorldForge game server, 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 cyphesis-cpp
cyphesis-cpp is installed in your system.
Make ensure the cyphesis-cpp package were installed using the commands given below,
$ sudo dpkg-query -l | grep cyphesis-cpp *
You will get with cyphesis-cpp package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Games |
| Package | cyphesis-cpp |
| Version | 0.6.2-2+b1 |
| Description | WorldForge game server |
| Sub Section | Games |