The Mega Pack features all the 10 linked campaigns bundled in one huge package. The player will have the chance to play all 150+ scenarios covering the entire war from the invasion of Poland and Norway on to the cold Russian winter against the Red Army on the East front, defend against D-Day and then take a final stand at Berlin.
Players can import their core force between the linked campaigns, or alternatively use a preset core force and play each of the campaigns on its own or jump in at any year. Gain skills and new equipment for your troops, lead them in a huge campaign map face the enemy and try to overturn your fate
Source: The Publisher Website.