Runescape,
Or the WoW 10 day free trial
:D
www.pokemonindigo.com
From a personal point of view, a free online game is really fantastic and one of the best things in life simply because they are free. Inspite this, we should be wary since these free online games may have viruses that can ruin our computer of can have malwares capable of hacking our personal information.
People are crazy for Farmvilla online game.
Being on top of your game is vitally important when it comes to computer field. The best place to go for these free lessons is www.techtutorials.net/.
wesnoth
Moshi Monsters!
swimgames.com
castle crashers
According to Tech Radar the best free online game to play is Planetside 2. The game is completely free, but there are in game micro purchases available.
The Febin Game :D
city cretor really fun online free just google it
yes if you are talking about the online game on the computer all u have to do is sign up!