If you’re looking for a (also called a CD key or product code) for BioShock Infinite , here’s what you need to know:

: A reputable third-party seller that provides official Steam keys while supporting charities. Why Avoid "Free Key" Generators

: Most "key generators" are disguised malware designed to steal personal data or hijack your computer.

If you're looking for a specific license key, here are some general guidelines:

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..."