If you buy a key from a third-party retailer like Humble Bundle: Open your . Click the "Games" menu at the top. Select "Activate a Product on Steam..."
✅ : Always keep a digital copy of your key (screenshot or text file) in a safe place after activation.
The is a unique alphanumeric code used to activate and register the game on digital distribution platforms. Most modern copies of the game are tied to Steam, though versions also exist for Xbox Live, Epic Games, GOG, and the Nintendo eShop. Where to Buy a License Key
Here’s a short write-up suitable for a FAQ, support page, or forum post regarding :
: Most "key generators" are disguised malware designed to steal personal data or hijack your computer.