To get a FREE 14 day access code to Xbox Game Pass for PC, you need to:
- Login, or register a new account at IGN website
- Visit keys page and press "Get Key" button on Microsoft Game Pass giveaway section
You will receive a code, which needs to be activated on https://redeem.microsoft.com/ and will grant you access to more than 100 PC games in Xbox Game Pass PC Games subscription. Enjoy!