The developer of Crusader Kings II is giving away a paid DLC for free to those who sign up for their newsletter.
The offer expires when a certain amount of keys have been claimed. The developer has not made clear how many keys exactly are being given away.
You will need to have Crusader Kings II in your Steam Library first. The game is permanently free. You can get it by clicking here.
How to get the DLC for free:
Go to the Crusader Kings website by clicking here.
Scroll down slightly and you will see a newsletter sign-up option. Enter your email address and agree to the terms.
The next page will ask you to create a password and enter your date of birth - do this.
Go to your email client. Open the confirmation and click the link in it.
Log into the account you just made and go to your account page (https://accounts.paradoxplaza.com/games). You’ll see a DLC there called “The Old Gods”.
Click “Manage”. Copy the Steam Key and redeem it via your Steam launcher.
(Once you’ve done this, you can, if you wish, unsubscribe from the newsletter by clicking the unsubscribe link at the bottom of the newsletter email when you receive one).