TouchArcade: It was just about a week ago that Konami soft-launched their Yu-Gi-Oh! card battling game, Yu-Gi-Oh! Duel Generation [Free (HD)], but already it appears the game has launched worldwide, popping up in the US App Store earlier today. Based on the original, physical Yu-Gi-Oh! card game, Duel Generation features over 6,000 cards, online multiplayer, and special weekly events. Perhaps most importantly, it allows you to play offline against a computer AI and features a single-player campaign, which is a nice feature for those who don't always have internet access.