Since official retailers no longer sell the game directly, you must rely on secondary markets or physical copies:
Click (bottom-left) -> Activate a Product on Steam . Enter your key to add the game to your library. Troubleshooting Common Activation Issues shift 2 unleashed activation key
: Buying a used physical copy from marketplaces like Amazon or eBay is a viable option. These discs contain a 20-character serial number that can often still be used for installation, though you may need to contact support if the activation limit has been reached. Step-by-Step Activation Guide Since official retailers no longer sell the game