Duel Online - Challenge Duelists from around the world with online play in Yu-Gi-Oh! Duel Monsters 4: Battle of Great Duelists! Select titles will also be updated to support online play after release. Customize your play - Unlock hidden characters and cards, the option to remove Deck Capacity, Duelist Level, and cards from the Forbidden & Limited List, customize your button mapping, and much more. Rewind Time - Turn back the clock with the Rewind function or fast forward to watch your strategy unfold at mach speeds. Save Anywhere - Pick up and Duel right where you left off with the option to save at any time. Digital Gallery - Explore preserved box art and manuals from each title in the Digital Gallery.