Hitman reference:In Chapter 2, when you start to fight the police after you pass a bus, Kane tells you to enter the store to your left. Look at the pictures in that store to see Agent 47 from the Hitman series.Mini Ninjas reference:Play the “Subway” multiplayer level. When you spawn, turn left to see five signs. The first sign features the cast from Mini Ninjas. Achievements:ACHIEVEMENT – HOW TO UNLOCKWelcome to Shanghai (20 points) – Complete