Online duels get the full arsenal. • Special weapons online — every weapon you've unlocked now comes with you into Game Center matches. Sonar sweeps, salvos, torpedo spreads, smoke screens, decoy buoys and EMP bursts all work against a human opponent exactly as they do in the campaign. Sink a ship and you lose its weapons for the rest of the duel. • Know what hit you — at the start of your turn you're told exactly what your opponent fired and what it cost you. • Single map mode everywhere — the split/single view toggle now works in online duels and pass-and-play, not just the campaign, and your choice is remembered across all three. • Watch the water while you wait — the boards stay on screen during your opponent's turn instead of a loading spinner, so you can study the damage to your own fleet. • Sinking animations now play in online duels too. • No more zombie games — abandoned duels are cleaned up automatically, turns expire after 24 hours, and the new My Duels screen shows every match you have running, whose move it is and how long it's been sitting. If an opponent walks away, the win is yours. • A refreshed soundtrack — every track re-mastered at higher audio quality.