Hitman reference:In Chapter 2 when you start to fight the police after you pass a bus, Kane will tell you to enter the store on your left. Look at the pictures in that store to see Agent 47 from the Hitman series.
Mini Ninjas reference:
In the “Subway” multiplayer level, when you spawn, turn to your left to find five signs. The first one sign features the cast from Mini Ninjas.
Trophies:
Bronze trophies
Welcome to Shanghai – Complete ‘Welcome to Shanghai’ on any difficulty.
Street War – Complete ‘The Details’ on any difficulty.
Death Sentence – Complete ‘Blood, Sweat and Tears’ on any difficulty.
Nowhere to Hide – Complete ‘Laying Low’ on any difficulty.
Baby be Safe – Complete ‘Coming Home’ on any difficulty.
Lost Love – Complete ‘A Thousand Cuts’ on any difficulty.
Double Cross – Complete ‘The Deal’ on any difficulty.
Slow Train to Hell – Complete ‘Out of Shanghai’ on any difficulty.
Bring It Down – Complete ‘Air Strike’ on any difficulty.
Kill or Be Killed – Complete ‘Resurrection’ on any difficulty.
Catch! – Push your human shield into an opponent in Story Mode.
Can It! – Kill 10 enemies with exploding canisters.
Mexican Showoff – Kill 5 enemies while downed before successfully recovering.
Sichuan Specialist – Escape the restaurant in ‘Laying Low’ without being downed on any difficulty.
Hand of God – Complete a Story Mode mission without dying once on any difficulty.
Chinese Waltz – Kill 5 enemies without losing your human shield.
Dance Off! – Execute 30 enemies while holding them as human shield.
Trigger Happy – Kill 5 enemies in 15 seconds with any pistol whilst not dropping your health below 90%.
Double Happiness – Kill 6 enemies in a row with a shotgun – all of them as one shot kills.
Steady Hand – Get 5 headshots in a row using the same clip.
A Little Help From a Friend – Complete 1 mission in Co-op.
No Going Back – Complete 5 missions in Co-op.
Giving a Hand – Finish 30 enemies your Co-op partner shot ‘Down Not Dead’.
Got Your Back – Revive your Co-op partner 10 times.
Welcome – Successfully escape once in Acrcade Mode or in any Multiplayer Ranked Match.
Doing Good – Successfully reach round 5 in Arcade Mode.
Greedy – Earn at least $5,000,000 in every level in Arcade Mode.
Lightning Looter – Reach $8,000,000 in under 6 minutes of actual playtime in Arcade Mode.
Safe Crime – Finish 5 rounds in a row without getting any penalties in Arcade Mode.
Battle Hardened – Complete one session in each Multiplayer Mode (Ranked Match).
Addict – Win 20 sessions of Cops