## rules.yaml
briefing = 
    The situation is critical! The Soviets have taken over a small research base in the north. During the conflict, a chronosphere was badly damaged. We fear it could explode.
    
    Inside the base is a group of scientists that were captured during the takeover. They must be rescued before the chronosphere explodes. Fight your way back into the base and retrieve them.
    
    Be careful -- there is only one way in and out of the base, a lone bridge. It must be protected to ensure evacuation.