GI: A friend who is really into Hong Kong gangster movies told me there are two things an undercover cop needs to do in order to successfully infiltrate the Triads: Learn how to effectively slide across flat surfaces while shooting two guns at once, and kill a cop as soon as possible. Surviving in Sleeping Dogs requires a slightly wider skill set—wearing the right muscle tee, knowing the best street food vendors, learning creative ways to snap limbs in twain, and driving like you’re an extra in 2 Fast 2 Furious. -