Some fun on-line Yu-Gi-Oh games include "Yu-Gi-Oh Duel," "Yu-Gi-Oh Card" and "Yu-Gi-Oh Monster." These all are based on the original Yu-Gi-Oh game and have free versions. They can be found at KidzWorld.com, BigMoney.com and YuGiOhGames.net.
"Yu-Gi-Oh Duel" is an on-line version of the popular Yu-Gi-Oh card game. There are free and paid versions of "Yu-Gi-Oh Duel" that can be played on-line.
"Yu-Gi-Oh Card" is a free game that lets a player choose Yu-Gi-Oh cards from a deck by clicking their mouse and playing it like a traditional card game.
In "Yu-Gi-Oh Monster," there are single player and multi-player versions. Their stories are similar to the original Yu-Gi-Oh story with some slight variations.