I think I need to compile it. These are the programs  in the directory:
bmike1@mikes-laptop:~/Games/Assault Cube/1.1.0.4$ ls
assaultcube.sh
demos
mods
screenshots
bin_unix
docs
packages
server.sh
config
install_desktop_menu.sh
README.html
server_wizard.sh
bmike1@mikes-laptop:~/Games/Assault Cube/1.1.0.4$


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:-)~MIKE~(-: