QQ Games

QQ Games is an online multiplayer games service, provided by Tencent America,
where you can play all the games without paying any subscription.

QQ Games is an official plugin for Aol Instant Messenger and it offers a wide collection of online casual games that are totally multiplayer and free.
As it is part of AIM, to start playing you need to be registered at AIM and have a screenname with password. There are about eight games available, ranging from cards, action, sports, puzzles, strategy and others, being Pool, Bubble Arena, and Treasure Hunter the most popular ones.
To access all the free games, you have to follow these steps. First download QQ Games client, which is totally free, and install it in your Pc. As it requires AIM, you need to have AIM already installed, and an account. Once inside QQ Games, you can choose from all the available games at the left-side tab. Simply click in your favourite game, wait for the game to load, and then click the Play Now button.
With QQ Games you can challenge your AIM friends to play with you, form your own teams, or, as QQ Games are completely played online, you have the chance of meeting people and making new friends. The graphics and sound effects are pretty cool. Two things against, one is that the games take long time loading, and the other is that you have to wait a lot of time until other players join a game.