Step 1: Create a Steam account

If you haven’t already, go to the Steam website and create a free account. You’ll need this to access your games and use the Steam key.

Step 2: Download and install Steam

Download the Steam application from the official website, and follow the installation instructions to set it up on your computer.

Step 3: Log in to your account

Open the Steam application and sign in with your new or existing account.

Step 4: Locate “Add a Game” button

At the lower-left corner of the Steam interface, find and click on the “Add a Game” button.

Step 5: Select “Activate a Product on Steam”

A new window will pop up. Choose “Activate a Product on Steam” from the options provided.

Step 6: Read through the terms and conditions

Before proceeding, read through the terms of agreement for activating a product on Steam. If you agree, click on “I Agree.”

Step 7: Enter your Steam key

A dialogue box will appear where you can enter your Steam key. Type or paste in the unique code provided with your game purchase.

Step 8: Verify your key

Double-check that you’ve entered your key correctly. Ensure there are no extra spaces or characters if you’ve copied it from another source.

Step 9: Activate your game

Click on “Next” to activate your game on your Steam account. The system will verify your key, and if it’s valid, you’ll see a confirmation message saying that the product has been successfully activated.

Step 10: Download and install your game

Once activated, navigate back to your library by clicking on “Library” at the top of the screen. Your new game should appear in your list of games. Click on it to start downloading and installing it onto your computer.

Step 11: Launch your game

Once the game is fully installed, you can click on it in your library and select “Play” to launch it.

Step 12: Enjoy your new game

You’ve successfully activated and installed a game using a Steam key! Enjoy playing your new game, and don’t forget to explore other features provided by Steam like the community forums, guides, and achievements.