This will convert it to a new 26 digit digital license key that will be permanently stored on your Games & Subscriptions page. After you add Diablo II (2000) to your Account, you can find the game key in Account Management. Please redeem your 16 digit physical CD key on your account. You cannot use a 16 digits physical CD key to install online. To install Diablo II you must enter a Diablo II key. You cannot use a Lord of Destruction key to install Diablo II. If the online installer doesn't accept your key, make sure you are entering the correct one. The online installer will ask you to enter your 26 digit license key -you can find your key on your Games & Subscriptions page.
Delete the old CD installer from your computer and download the latest installer from the Blizzard downloads page. You cannot install from CD anymore -your original 16 digits physical CD key will not work. However, if you registered your physical copy of Diablo II on your account, your original 16 digits CD key was converted to a new 26 digit digital license key. When you install Diablo II from a CD, the installer will ask you to enter the 16 digits CD key found inside the box. Every time I try to find a key gen it isn't valid because the installer is asking me for a 26 character cd key but all the keygens I find are only 16 characters I do have the game legitimately but I lost the Lod cd key.