Land 1 hit.
Land 25 hits in a single playthrough.
Don't fire a single shot until you have to.
Complete the game on NORMAL difficulty.
Complete the game on INSANE difficulty.
Complete the game on DEMENTED difficulty.
Obtain all upgrades.
Beat the game fast enough.
Go 4 minutes without being spotted. Hiding in closets and safe areas does not count.
Well, did you?
Finish without dying. Don't try reloading a save if you die.
