Score a decapitating head shot
Beat down an enemy
Complete Mission 6 on Normal
Complete Mission 7 on Normal
Complete Mission 8 on Normal
Complete Mission 9 on Normal
Complete Mission 10 on Normal
Complete Mission 1 on Hard
Complete Mission 2 on Hard
Complete Mission 3 on Hard
Complete Mission 4 on Hard
Complete Mission 5 on Hard
Complete the game on Easy
Complete Mission 6 on Hard
Complete Mission 7 on Hard
Complete Mission 8 on Hard
Complete Mission 9 on Hard
Complete Mission 10 on Hard
Beat down 15 enemies
Score 15 decapitating head shots
Find and pick up every weapon
Complete the game on Normal
Complete a level firing only a pistol
Complete a level without dying
Complete the game without being killed by an Infected
Kill 3 enemies with one pistol clip
Kill 5 enemies with one AK47 clip
Kill 5 enemies with one M16 clip
Kill 15 enemies with one belt of a non-mounted Heavy Machine Gun
Kill 3 enemies with one rocket or grenade
Kill 15 enemies with the machete
Complete the game on Hard
Kill 150 enemies
Complete the game twice
Dismember 50 enemies
Complete Mission 1 on Normal
Complete Mission 2 on Normal
Complete Mission 3 on Normal
Complete Mission 4 on Normal
Complete Mission 5 on Normal
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