Sleeping Pills
Not unlocked yetComplete a level whilst using naught but the Tranquilizer Rifle.
Smooth Operator
Not unlocked yetFinish 'Abandoned Complex' without killing anyone.
Unscathed
Not unlocked yetComplete a level without taking any damage.
Iron Man
Not unlocked yetComplete a level without saving once.
Best Served Cold
Not unlocked yetKill the Degenerate.
The Enemy of my Enemy...
Not unlocked yetSpare the Baker.
Cause and Effect
Not unlocked yetKill the Baker.
...is my Friend
Not unlocked yetFinish the campaign with the Baker spared.
On My Own
Not unlocked yetFinish the campaign with the Baker killed.
Professional Boxer
Not unlocked yetFinish the campaign without using any weapons.
Hippy
Not unlocked yetComplete the game without killing a single enemy, unless when forced to.
Unrelenting Anger
Not unlocked yetKill everyone throughout the campaign.
Games Journalist
Not unlocked yetComplete the game on the 'Easy' difficulty.
True Grit
Not unlocked yetComplete the game on the 'True' difficulty.
Hands-on Experience
Not unlocked yetComplete the game with ammo auto-grab disabled.
Do Not Disturb
Not unlocked yetComplete the level "Steve's House" without firing a single shot.
Gun Nut
Not unlocked yetUnlock all unique weapons.
CBT
Not unlocked yetYou must really enjoy pain. Finish the game on 'Masochist' difficulty.
Alcoholics United
Not unlocked yetPass out from drinking too much.
Creep
Not unlocked yetYou really enjoy listening in on private matters, don't you?
Sniper
Not unlocked yetObtain a 100% accuracy rating with 40 or more shots fired.