bzflag-client software package provides BZFlag client, you can install in your Debian 8 (Jessie) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install bzflag-client
bzflag-client is installed in your system.
Make ensure the bzflag-client package were installed using the commands given below,
$ sudo dpkg-query -l | grep bzflag-client *
You will get with bzflag-client package name, version, architecture and description in a table
| Distro | Debian 8 jessie |
| Section | Games |
| Package | bzflag-client |
| Version | 2.4.2+ds1-5+b1 [amd64, armel, |
| Description | BZFlag client |
| Sub Section | Games |