The term identifies a specific edition of a popular post-apocalyptic role-playing video game, packaged in a protective metal case. This version is often sought after by collectors and enthusiasts.
Its significance lies in its collectible nature and the added value it represents. It often includes exclusive content or aesthetic enhancements beyond the standard edition of the software. Historically, special edition packaging like this has been used to incentivize early adoption and reward dedicated fans of a franchise.