If you do not have a Steam account, you will need to download the client from the official website, install it and then create your account. Once you are logged into your account, click on "Add game" in the bottom left corner and then on "Activate product on Steam". After a few clicks on "Next", you can finally enter your CD key, the game will automatically be added to your library and the download will begin.
Use your activation code to download the game from EA App.
Crysis
If you do not have an account with EA app (formerly Origin), you can download the client from the official Electronic Arts website and install it on your computer. When the installation is complete, follow the on-screen instructions to create an account. Then go to the "My Game" tab in the EA app client and click "Add Game" at the top of the page. When you enter your activation code, you will finally be able to download your game, which will automatically be added to your game library.
Use your Microsoft Points game card on Xbox Live Marketplace on your Xbox Series X, Xbox One or Xbox 360 to buy full games, rent the latest movies in high definition and enhance your games with downloadable content. Unlock the full potential of Xbox Live! To access Xbox Live Marketplace, you will need the following components and services: an Xbox Series X, Xbox One or Xbox 360 console, a broadband internet connection, an Xbox Live Silver membership (included in Xbox entertainment content), a Microsoft account and an Xbox console hard drive or storage unit.
Xbox Series X UNITED STATES
Localization restrictions applied. This product can be activated only in the United States of America.
×
CD key to use on the GOG GALAXY client to download your game.
Crysis
To activate a game you download on GOG Galaxy, open the application on your computer, log in to your account, click on the menu icon, and then select "Game Codes". Enter the game code in the appropriate field and click "Continue". Once the code is verified, the game will automatically be added to your GOG Galaxy library where you can download and play it.
answering the message of 
