This giveaway is now closed. Winners have now been emailed their codes.
Follow these steps to install Hearthstone:
1. Log in to Battle.net account management using your Battle.net account
2. Go to Games & Codes > Add a Game Key.
3. Enter your game key
4. Select Windows or Mac as your operating system. This will begin the combined Hearthstone: Heroes of Warcraft/Battle.net download and installation process.
5. Once prompted, enter your Battle.net account name and password. The Hearthstone: Heroes of Warcraft installation process should continue automatically.
6. Once installation is complete, press Play and enjoy!