$ sudo apt-get update
$ sudo apt-get install openarena-085-data 

openarena-085-data is installed in your system.

Make ensure the openarena-085-data package were installed using the commands given below,

$ sudo dpkg-query -l | grep openarena-085-data *

You will get with openarena-085-data package name, version, architecture and description in a table

openarena-085-data package basic information: