"Scrap Metal 7 Unblocked" seems to refer to a specific version or iteration of a game within the Scrap Metal series that has been made accessible through unblocking, often required in school or workplace networks where gaming sites are restricted. The Scrap Metal series itself appears to be a collection of games that involve vehicular combat or demolition derby-style gameplay, where players control vehicles (often with a focus on rugged, scrap metal-type vehicles) in various arenas or tracks, competing against other vehicles.