: Platforms like Steam, GOG, and Origin often sell keys for classic games. However, "Command & Conquer: Generals Zero Hour" might be part of a bundle or available through a subscription service.

be redeemed on Steam or the EA App; they only work for the physical disc installation. 2. Common CD Key Issues & Fixes

If you attempt to play online with a key that three other people are using simultaneously, you will get a "Key already in use" error. The official EA servers are dead, but third-party clients enforce key uniqueness per session.

However, the landscape has changed recently. Understanding where to buy is the first step in avoiding scams.