There are. It's called "Duel Monsters Unlimited". Here's how you get it.
Download this. It's called the Byond Pager. With this, y ou can play any game on the Byond website.
http://www.byond.com/download/
This here is the actual game. You can't play it without the pager, so get that first. Whe nthe game starts up, you will find your icons in the lower right corner. If you don't see it, use the "Options" in the top left corner and change your screen size until you see them. From there, you can use the brown box to buidl your deck with ANY cards. (No buyign them and such.) and you can use the Silver cog (gear) to change your character. Finally, the Red duel runner starts your duel disk and you can duel anyone anywhere! Have fun!
http://www.byond.com/games/UnknownDuelist/DuelMonstersUnlimited
There are many websites which have free online multiplayer games. For instance, Texas Hold'em and the game called Scrabble are multiplayer games and are available to play through websites such as Pop Cap. Game Sheep and Free Arcade also have multiplayer games.
There is a link in the related links that has a list of multiplayer online games, both free and paid.
There are a lot of online multiplayer games on the internet that are free of charge. I suggest gamehouse and addictinggames. Those are the sites that I use most often.
Some good midieval games are... Fate (19.95) Fate Undiscovered Realms (19.95) Runescape (free online multiplayer) World of Warcraft (free 14 day trial also an online multiplayer) Wizards 101 (free online multiplayer)
Are you talking about Flash internet games or Online Multiplayer games?
Sites such as Miniclip, Pogo, GameSheep, and Candy Stand all offer free online multiplayer games to play. Alternatively, one could also visit one of the many free online multiplayer game listing sites such as MMOBomb, MMO Hut, and FreeMMOGamer.
Yes, it is a massive multiplayer online video game that is free.
Free games are available to play at places like AOL games.
Aeriagames.com and also outspark.com
yugioh network
Outspark offers the highest quality free online multiplayer games
Here is a short list of good multiplayer games:runescapewizard 101clubpenguinspineworldbinweevelshabbo hotelguild warsThere is also a link in related links to a site that has a list of free online multiplayer games.