Hearts of Iron IV Game Keys

Go to: http://store.steampowered.com/ and download STEAM client
Click "Install Steam" (from the upper right corner)
Install and start application, login with your Account name and Password (create one if you don't have).
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Click the Games Menu.
Choose Activate a Product on Steam...
Follow the onscreen instructions to complete the process.
After successful code verification go to the "LIBRARY" tab and start downloading.

Years before Europe went to war, Japan’s imperial ambitions targeted the divided Chinese Republic. Crippled by political paralysis and centuries of fitful development, China is still not a pushover. With vast reserves of manpower and resources, not to mention a giant landmass, the Republic of China and its temporary ally, the Communists under Mao, can withstand another aggressor. There have been, after all, very many. Waking the Tiger is the newest expansion for Paradox Development Studio’s celebrated World War II strategy wargame, Hearts of Iron IV. This expansion adds new gameplay options for all players, and has a special focus on the Asian front of the deadliest war in human history.