For detailed information about this series, see: Yu-Gi-Oh Wiki
Yu-Gi-Oh is a manga series about card dueling published by Shueisha part on their Shonen Jump magazine. It was adapted into an actual card game and videogames by Konami.
Yu-Gi-Oh the card game started in 2002 made by Konami.
There are many Yu-Gi-Oh manga and books.
Film & TV
Yu-Gi-Oh! (show April 4th 1998-October 10th 1998)
Yu-Gi-Oh! (film March 6th 1999)
Yu-Gi-Oh! Duel Monsters (show April 18th 2000-September 9th 2004)
Yu-Gi-Oh! The Movie: Pyramid of light (film August 13th 2004)
Yu-Gi-Oh! Duel Monsters GX (show October 6th 2004-March 26th 2008)
Yu-Gi-Oh! 5D's (show April 2nd 2008-March 30th 2011)
Yu-Gi-Oh! Bonds Beyond Time (film January 23rd 2010)
Yu-Gi-Oh! Zexal (show April 11th 2011-September 24th 2012)
There are many Yu-Gi-Oh Video games.