actually you can't unlock them
but
new levels will come
all of them
to do this you have to win a lot of medals .if you dont know what im talking about medals ,you know when you win a level in system defender they show you a medal. for now i have the herbert level ,the protobot level and the first one .sorry but i dont know whats the name of the first level. by the way i saw on some thing that there are a lot of more levels but i know you have to win medals to win them . have fun unlocking more levels!
Three
I'm not really sure but last time, I played the member-only levels and for no reason, I got 2 medal, so maybe...
The Microsoft Corporation created windows defender. They named it windows defender because they also made the windows operating system.
there are more than 170 but I have not got to the end of the game yet
Set up cannons on the corners. Yellow cannon seem to work well.
its in the EPF command room
Defender of the Faith is one of Queen Elizabeth's titles, which means she will protect the British religious system and church.
Windows defender is designed to stop viruses from infecting your windows based system. This software only works with a windows based system it is not for LInux.
EPF Command room
Public Defender.