Warlord Games 
Bolt Action: Campaign: Battle of the Bulge [PDF ebook] 

The Ardennes, 1944. Driven back by the Allies since D-Day, Germany launches a surprise offensive on the Western Front. This assault against the unprepared Allied lines is the opening move in one of the largest battles of World War II. This new Campaign Book for Bolt Action allows players to take command of both armies in this desperate battle, fighting it as they believe it should have been fought. New, linked scenarios, rules, troop types and Theatre Selectors provide plenty of options for novice and veteran players alike.