No.
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.
Team Fortress 2 is a great free multiplayer co-op game.
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.
Free games are available to play at places like AOL 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.
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)
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.
Naruto ArenaNaruto-Arena.com
Aeriagames.com and also outspark.com
if you are in the lobby just type if you are in a game press tab and right
Are you talking about Flash internet games or Online Multiplayer games?