Lies & Spies X!
Espionage! Secret Agents! Intrigue! Hair-raising escapes! Thrills and adventure using familiar rules! Who wants to read through reams of text just to get to the action? No-one right? These rules assume you know how to role play. They assume you know about "Golden Age" comic book pulp spy stories (surveillance and undercover investigations through a retro lens). They assume you know how OSR products work. There¸ it's done. You know how to play already. Just get on with it.