Stranglehold Cheats

Hint - Broken Achievments
I was playing this game on Hard and I got all the way to the second half of the final boss fight before I finally gave up and lowered the difficulty to Normal.

I got the achievement for "Normal Completion" which surprised me a little because I only beat the last part of the game on Normal.

The next time I clicked "continue" with the intent to beat the final battle on "Hard", and it just went to the final cut-scene and I got the achievement for "Hard Completion"!

I tried it on "Casual" and got another achievement. It seems the only difficulty this wouldn't work on was "Hard Boiled", but I'm certainly not complaining. I'm not sure if this works if you beat the majority of the game on lower difficulty levels, but I just wanted to share this with the world.

If you load that last checkpoint via Continue game, you can get the 'Old School' achievement as well!

Easter Egg: Movie Theater Trailers

In the first chapter (Hong Kong Marketplace), head to the Ambushed section. After you kill everyone in the courtyard and move along the alleys, you will be forced inside a building (there's no where else to go). As soon as you enter, there should be a door you can break. Break it and go along the corridor until you reach a movie theater. On the movie screen are trailers for Wheelman and Blacksite.

Achievements
Complete each achievement to get the allotted gamerscore.

Barrage Specialist (10): Use the Barrage special move with every weapon.
Be the Master (20): Kill 100 opponents as John Woo in Multiplayer matches.
Bullet Ballet (20): Kill 50 opponents while in Tequila Time in Multiplayer matches.
Chicago History Museum Completed (20): Complete the Chicago History Museum level on any Difficulty setting.
Chow Would Be Proud (15): Kill 10 enemies with a 5 star kill rating.
Deadly World (25): Kill 50 enemies by using the environment instead of guns.
Death by Swing (25): Kill 50 enemies while hanging from a chandelier.
Freedom! (10): Purchase all of the Multiplayer characters in the Unlock Shop.
Game Completed - Casual (40): Complete the entire game on the Casual Difficulty setting.
Game Completed - Hard (60): Complete the entire game on the Hard Difficulty setting.
Game Completed - Hard Boiled (70): Complete the entire game on the Hard Boiled Difficulty setting.
Game Completed - Normal (50): Complete the entire game on the Normal Difficulty setting.
Geronimo! (15): Host and complete 10 multiplayer matches on the Totem Pole Gallery map.
Hardboiled Killer (20): Kill 307 opponents in Multiplayer matches.
Hong Kong Marketplace Completed (10): Complete the Hong Kong Marketplace level on any Difficulty setting.
I Don't Know How to Play Those (20): In The Mega Restaurant level, complete the Casino or the Restaurant without using the Guitar Cases.
It's All Mine... (30): Purchase every item in the Unlock Shop.
Jurassic Battle (15): Host and complete 10 multiplayer matches on the Dinosaur Rotunda map.
Killing Spree (20): Get 5 kills in a row without dying in a Multiplayer ranked match.
Lounge Lizard (15): Host and complete 10 multiplayer matches on the Mega Lounge map.
Massive D (20): Cause at least $75,000,000 of damage.
Master of Barrage (25): Kill 100 enemies with the Barrage special move.
Master of Precision Aim (25): Kill 50 enemies with the Precision Aim special move.
Master of Spin Attack (25): Kill 100 enemies with the Spin Attack Special Move.
Meet John Woo (5): Visit the Unlock Shop.
Mega Jackpot (15): Host and complete 10 multiplayer matches on the Golden Dragon Casino map.
Movin' on Up (15): Host and complete 10 multiplayer matches on the Chicago Penthouse map.
Nobody Has That Much Style... (60): Acquire 5,000 total Style Points.
Old School (25): On any difficulty setting, complete a level without using any of the Tequila Bomb Special Moves.
One Gun To Rule Them All (10): Finish in 1st place in a Multiplayer ranked match.
Origami Master (35): Collect 250 Origami Cranes.
Paleontologist (10): In the Chicago History Museum level, completely destroy the Brachiosaurus or the T-Rex.
Rolling Death (25): Kill 50 enemies while riding on a roll cart.
Ruthless (30): Perform a 50 star Style Combo.
Sea Food (15): Host and complete 10 multiplayer matches on the Tai O Drug Labs map.
Slums of Kowloon Completed (20): Complete the Slums of Kowloon level on any Difficulty setting.
Stay Dry (10): In the Slums of Kowloon level, stay along the top pathway in the crumbling sewer area.
Tai O Completed (10): Complete the Tai O level on any Difficulty setting.
Tea Party (15): Host and complete 10 multiplayer matches on the Kowloon Teahouse map.
The Killer (10): Fire 10,000 times.
The Mega Restaurant Completed (15): Complete The Mega Restaurant level on any Difficulty setting.
Untouchable (10): On any difficulty setting, complete a Standoff by defeating all enemies without taking any damage.
Winner Takes All (20): Kill 50 opponents using Tequila Bombs in Multiplayer matches.
Wong's Estate Completed (25): Complete the Wong's Estate level on any Difficulty setting.
Zakarov's Penthouse Completed (15): Complete the Zakarov's Penthouse level on any Difficulty setting.