John Woo Presents Stranglehold Cheats

Unlockable: Hard Boiled Difficulty

Unlock Hard Boiled difficulty by clearing the game on any difficulty
Hint: Conserve Your Fuel

When using the Barrage special ability in single player, your character is both invulnerable and has infinite ammo; if you need to cut the ability short to conserve the Tequila Bomb meter, press the D-pad RIGHT again to turn off Barrage mode. The unused Tequila Bomb energy may be conserved for later use.
Hint: Easy Stay Dry Achievement

Although you can simply run across the crumbling areas of Chapter 6 Slums of Kowloon for the achievement, you can also load the checkpoint “Condemned” in chapter select and shoot-dodge to the corner where the Heavy Machine Gun is and grab the achievement.
Hint: Easy Untouchable Achievement

The first shoot-out event in Chapter 1: Hong Kong Marketplace gives you a cinematic Tequila Time; use that training/tutorial advantage to down all three enemies without being hit for the achievement.
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.