What is a Steam CD Key?
A Steam CD key is a unique code that is used to redeem a game on Steam. It is a 25-character code that is usually found on the back of the game’s CD case or on a digital download card.
How to Redeem a Steam CD Key
To redeem a Steam CD key, first sign in to your Steam account. Then, click on the “Games” tab and select “Activate a Product on Steam”. Enter your CD key and click “Next”. The game will then be added to your Steam library.