1. Initially, you have to identify the GOG discount code you're keen on from this page and click on Get Code, located on the right side of the title.
2. You'll observe the offer code being displayed and automatically copied to your clipboard after a single click.
3. Following this, you'll be required to go back to the checkout page of gog.com, spot the promotional code box, and input the code you copied earlier.
4. Lastly, you are required to click on Apply Code to ascertain the amount of discount applied to your present order.