Darkwatch - Hold two weapons

Quick clear:
While fighting a group of enigmas and there is a Dark Mark Evil Tree, quickly destroy the tree before fighting any enemies. When it is destroyed, it will shoot a shockwave, instantly destroying all enemies in that area.

Rapid fire pistol:
Hold down the fire button R1 on the pistol Redeemer to fan it, or shoot in rapid fire.

Blood vision:
Press R3 to activate your blood vision.

Defeating Banshees:
Be careful while fighting banshees. If you cut off their arms and they still live, they will fire non-stop energy balls at you.

Defeating Lazaurus:
While fighting Lazaurus for the final time, hide in the house when he is using his twister move; it will shield you. Also, when he shoots his fireballs and smoke clouds, shoot them; they will blow up and you will be unharmed.

Ducking:
Press L3 to duck.

Evil deeds:
Blood Frenzy: Adds a supernatural boost to hand-to-hand combat.

Black Shroud: Covers you in a black shroud of darkness that hurts enemies when they attack for a short time.

Immortal Friends: No matter how many times you shoot Cassidy or Tala, they will not die.

Soul Stealer: Sucks the souls right out of living enemies can be used at a distance.

Turn: Turns some enemies against each other for a short period of time.

Good deeds:
Fear: Some enigmas will run scared for a short time.

Mystic Armor: Strong armor possible 0 damage for a short time.

Silver Bullet: Infinite and more powerful bullets for a short time.

Vindicator: Shoots a chain of lighting that instantly destroys most small monsters.

Here are the requirements for the Gunslinger mode in Extras, complete these tasks to unlock art for that specified level.

Allies art, Bosses Art:
Complete Curse Of The West on Shootist Difficulty.

Attract Mode Movie:
Complete Dead Light Prism with 80 or more Kills.

Cowboy Animatic:
Complete Torture Maze with 30 or more Melee Kills.

Darkwatch Archives:
Complete all Gunslinger levels on Deadeye.

Enemies 1:
Complete Boneyard with 65 or more Accuracy.

Enemies 2:
Complee Showdown with 20 or more Melee Kills.

Environments 1:
Complete Darkwatch Outpost with No Deaths.

Environments 2:
Complete Invasion on Deadeye Difficulty.

Environments 3:
Complete Curse Of The West in 10 Minutes or less.

Evolution of Jericho:
Complete the Single Player Campaign on any difficulty.

Highmoon Trailer:
Complete Rescue in 15 Minutes or less.

Rescue Intro Movie:
Complete Hangtown with 20 or more Headshots.

Showdown Animatic:
Complete The Right Train on Shootist Difficulty.

Vehicles:
Complete Deadfall with 20 or more Headshots.

Weapons:
Complete Morning After with 70 or more Accuracy.

Wrong Train Animatic:
Complete The Wrong Train with 65 or more Accuracy.