Microsoft has this wonderful knack of revealing games that haven't yet been announced. They do this via game pages on Xbox.com. Sometimes these pages are taken down, sometimes they remain. Well, Microsoft has done it again but neither developer Other Ocean Interactive nor publisher Konami must mind too much as the game page can still be seen at this moment. The game in question? Yu-Gi-Oh! Millennium Duels
Details on the title are scant. The game will allow players to duel Yu-Gi-Oh! characters from both the current period and the past. Players will be able to battle each other online, or form a team of up to four players to take on opponents co-operatively. Aside from this, you'll have to glean more details from the following screenshots:
Microsoft has attached a release date of March 24th to the XBLA title but, knowing how reliable these dates often are, I wouldn't pin your hopes on a release on that date. The game's release on other platforms is unconfirmed. However, Other Ocean was one of the first developers to be confirmed for the ID@Xbox scheme, so there is a chance that the title may also be released on the Xbox One.