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XIII will have a "sixth sense" meter that will alert you to nearby enemies, though you may also see visual depictions of nearby characters, such as the words "Tap tap tap" floating in the air to indicate enemy footsteps (much like in a comic book). The game will have various comic book-style elements that will help progress the story, provide you with clues, and provide additional dramatic effect. For instance, skillfully taking down an enemy soldier with a well-placed shot may cause a series of cartoon-style panels to pop up in the top-left corner of the screen, indicating the enemy taking the hit, shouting "Ugh!," and falling to the ground. The screen will even change if you're too close to a grenade when it discharges; the explosion will leave a residual ringing sound (to simulate the ringing in your ears), and the screen display will briefly blur until you can recover.
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