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Locate the Secret Room during the Tutorial.
Kill two enemies during one Shoot Dodge.
Kill four enemies with one thrown grenade.
Kill 10 enemies during one use of Bullet Time.
Snipe 10 consecutive enemies without missing a shot.
Complete Part I on any difficulty.
Complete Part II on any difficulty.
Complete Part III on any difficulty.
Complete the game in Hard-Boiled mode.
Finish the game quicker than the Remedy par time in New York Minute mode.
Complete the End Combat.
Declare war against the Rats.