Sudden Strike 4: Complete Collection is the full WWII real time strategy package, containing not only the base game but also all the DLCs, including Battle of Kursk, Road to Dunkirk, Finland: Winter Storm, Africa: Desert War and The Pacific War. Sudden Strike 4 marks a return to a more thoughtful breed of real time strategy game. Where many RTS games in recent years have focused on a relentless drive forward in each encounter, Sudden Strike 4 encourages greater deliberation and consideration of every unit under your command. Much of that comes from the fact that there's no base building.