Kill five enemies with the knife on Easy Difficulty

Take 'em down

Kill five enemies with the knife on Normal Difficulty

Easy does it

Kill five enemies with the knife on Hard Difficulty

Kill five enemies with the knife on Nightmare Difficulty

Kill ten enemies with the knife on Easy Difficulty

Kill ten enemies with the knife on Normal Difficulty

Kill ten enemies with the knife on Hard Difficulty

Kill ten enemies with the knife on Nightmare Difficulty

Kill the outlaws except the boss using only the knife on Easy Difficulty

Kill all the outlaws except the boss using only the knife on Normal Difficulty

Kill all the outlaws except the boss using only the knife on Hard Difficulty

Kill all the outlaws except the boss using only the knife on Nightmare Difficulty

Finish the game without raising your health on Easy Difficulty

Finish the game without raising your health on Normal Difficulty

Finish the game without raising your health on Hard Difficulty

Finish the game without raising your health on Nightmare Difficulty

Finish the game without taking damage on Easy Difficulty

Finish the game without taking damage on Normal Difficulty

Finish the game without taking damage on Hard Difficulty

Finish the game without taking damage on Nightmare Difficulty