Knock on all Doors (KOAD) is a 12 scenario module for Command Ops 2 covering the momentous decisions in the first 48 hours of the battle of the bulge in Belgium 1944. These are very large scenarios in terms of area and forces. But they are relatively short and allow you to command either of the three German Armies (1SS Panzer Corps, 5th Panzer or 7th) or the thinly stretched American forces and make the key initial decisions that will determine the outcome of this famous battle. There are four sets of three scenarios. The first is the historical O-Tag or Day 1 set that commence on 16 December. The second or “Decision” set allows the player the opportunity to explore the famous “what ifs” faced by the German commanders on the second day of the battle 17 December. The third or “Knock” set works on the basis of employing the original staff plan, developed by General Manteuffel that embodied the concept of “knock on all doors and pour through the ones that open”. The fourth “Big Knock” series takes this concept a little further and employs an augmented order of battle. One of the joys of KOAD is the sheer scope of these scenarios. They enable you to gain an insight into the operational issues faced by the army commanders; explore options for employing different courses of action and game out the famous what-ifs that historians and analysts have debated.