Climb Aboard Hitler's Steel Behemoth! It is November 1944 and as winter descends, the Allied advance rumbles to a halt on the borders of Fortress Germany. The US Army and German defenders settle down in a stalemate as they watch each warily across the Siegfried Line. In just a few short days Operation Watch on the Rhine, or the Battle of the Bulge as history will come to know it, will be launched, but other forces are also at play in the snowy Ardennes.

Credible intelligence reaches a local resistance cell that an armored train which contains the Fuhrer himself, is heading toward a secret Black Sun and Nachtwulfe facility deep in the heart of the forest. With time pressing, resistance leader Marta Archambaud seizes her chance and decides to gamble on a covert raid, hoping to clamber aboard, sweep through the train, and cut off the head of the snake by assassinating Hitler himself.