Tarnished Star is the core law enforcement and security rulebook for Shadowrun, Sixth World. Shadowrun has a long history of law enforcement and security-themed books. Book from previous editions such as Lone Star, Corporate Security, and Street Lethal highlighted those enforcing the law but also tricks and tactics used against shadowrunners and crime in general. Tarnished Star takes this a step further and not only looks at and updates these tactics, techniques, and tech currently used by the law in the Sixth World, but it also takes a look at those behind the badges. Additionally, it delves into the complex relationship between shadowrunners and law enforcement/security agents, not only as antagonists but sometimes as allies and contacts.