Access key

An access key (sometimes called "key code" or simply "key") is a 25-digit alphanumeric code used to create an account or to add features to an existing account. It has to be entered during the registration of the game account in order to be able to play online. Key codes can be bought either online or at a store stocking a Guild Wars game product.

The access key also defines which geographic server the player initially connects to, however, the player may change his home territory later during setup.