1. Copy the key you have got after transaction. You can find the key in your profile on the site Oplata.info:

2. Firstly, you will need to download and install GOG Galaxy, GOG's download and games manager software.

3. Run the GOG Galaxy application and log in to your existing account or create a new one:

4. Click the GOG icon in the top left corner and choose "Redeem Code". Type the GOG key exactly as it appears in your profile on the site Oplata.info:

5. And that's it! From here, you may navigate to your GOG library where you will see the new title waiting for you. Now go forth & game on!