Your mission is to make sure the security of all area. For this you want to wipe out the enemy ship that is seeking to invade Earth’s orbit. Fire your cannon as normally as essential to keep the Earthlings harmless!
Your mission is to guarantee the safety of all room. For this you need to wipe out the enemy ship that is making an attempt to invade Earth’s orbit. Hearth your cannon as usually as important to continue to keep the Earthlings protected!