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The EMPEROR'S CHILDREN Legion betrayed their figurative father -- the Emperor of Man -- some ten ...

The EMPEROR'S CHILDREN Legion betrayed their figurative father -- the Emperor of Man -- some ten thousand years ago, during the Horus Heresy. The Legion fell to the perverse temptations of the Chaos God Slaanesh, becoming addicted to the sensations of battle and conquest. They have served the Prince of Excess ever since. -- Once the Imperium's finest tacticians and siege-masters, the IRON WARRIORS sided with Chaos in the ancient Horus Heresy and turned their skills against Humanity. The Legion's warsmiths now blend ancient technologies with daemonic gifts, creating terrible war machines and fearsome weapons.

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Recommended Requirements:

To activate the Steam key you've received, follow the instructions below;

First up, open the Steam client. (If you don't have it, simply click the "Install Steam" button here => Steam Store )
Sign in to your Steam account. (If you don't have one, click here to create a new one => Steam Account)
Click on the "ADD A GAME" button in the bottom corner of the client.
Then, select "Activate a product on Steam..."
Write down or copy-paste the activation key that you've received from %s in the window.
Your game is now visible in your library! Click on your "Library".
And finally, click on the game and select "Install" to start your download.