When you reach the leve requim, aka the last level,you will see your self in a coffin with your guns on your chest.the credits start to play as if the game is over...its not. oyur life bar will flash as if a heart rate and things will go from clear to blurry. just click each of the sticks until you revive. then your goal is to kill everyone.after u do that then you will see a checkmark and the last cinematic. congrats you completed the game for real.