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.
Localization restrictions applied. This product can be activated only in the United States of America.
×
Code for Xbox to be activated on Xbox Live.
Pit People
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.
answering the message of 
