Tomb Raider VI: The Angel of Darkness (2003)

Step 1: Install the Steam Client

• Download and install the Steam Client from the official website:
  

Step 2: Open Steam

• Launch the Steam client on your computer.
• Log in to your Steam account if you're not already logged in.
• If you do not have an account, click Create a New Account and follow the instructions.

Step 3: Go to "Activate a Product on Steam"

• In the Steam client, click on the Games menu at the top.
• Select Activate a Product on Steam from the dropdown menu.

Step 4: Enter Your Product Key

• Copy and paste or manually enter your Steam product key.
• Click Next to proceed.

Step 5: Confirmation and Installation

• The game will be added to your Steam library.
• You can start the installation immediately or access it later from your library.

Step 6: Access Your Game

• Go to the Library tab in the Steam client.
• Locate your newly activated game and click Install to begin downloading.

Troubleshooting Tips

• Invalid Code Error: Double-check for typos.
• Region Restrictions: Ensure the activation key matches the region of your Steam account.
• No Internet: Confirm your internet connection is active.

For further assistance, visit Steam Support.