Dead to Rights II - Platform: Playstation 1

Expert mode:
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Finish the game on Hard mode.

Extra adrenaline:
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Finish instant action mode on normal.

Hard mode:
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Finish the game on Normal mode.

Molotovs:
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Finish the game on Hard.

Rocket launcher:
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Finish the game on Expert.

Shoot through walls:
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When you are chasing Steve Houstown for metal fences that are taller 
then you and have a building that in beside it, go up to it and hold 
R1 and you may or may not target an enemy thats on the other side of 
the building around the corner. If the target is green, orange, or red. 
Start shooting only if the target is one of those colors, and it will 
actually hit the enemy and kill him if you keep shooting.

Gallery 1:
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Complete the game on the Easy difficulty setting.

Gallery 2:
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Beat instant action on Easy Mode.

50. Desert Eagle:
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Finish the game on Normal.

Cabal Pistols:
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Complete the game on the Easy difficulty setting.

Cabal SMG:
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Beat instant Action on Easy Mode.