Zamok Mertvykh

After discovering the ancient evil of planet Mars, our four heroes have now been sent back to Earth, and in the process have landed 200 years back in time. They now find themselves at an ancient Prussian castle in Siberia. Group 935 once setup an outpost here for research of an ancient power that could have been hidden there.Now it is up to Dr. Edward Richtofen, and his allies to finish the research, and find out what exactly links this ancient castle with Mars.