Note @daymickcorr PR: turnkeylinux-apps/gameserver#6
As discussed in the forums, how to update the Gameserver game list is not currently documented.
At the very least it should be documented on the readme / appliance page. But ideally a helper script and confconsole plugin should be provided. Perhaps even an option to do automated updates (e.g. once per week?)?
In the meantime, the manual way to update is:
systemctl stop gameserver
cd /root/gameservers
git pull origin master
systemctl start gameserver