The HeartsofIron3_Demo.exe file you have requested: Official Demos / Hearts Of Iron 3 Playable Demo - 615.18mb is not available. Perhaps try browsing all files for the game Hearts of Iron III and upload any files you want to share or are missing. This is the only information we could locate:
This demo allows you to play as either Germany, France, Poland or the United Kingdom for the first four months of World War II. This demo gives players a taste of what they can expect from Hearts Of Iron 3. This demo contains the Tutorial plus Single Player Campaign of 1939.