Alright, here is the most addicting free game website I have found ever... it's multi-player tetris, you can play a few versions of tetris vs. other players (but not necessarily real time, I think you are actually playing vs. a previous game someone else played because you can pause the game indefinitely, you'll see what I mean) or a new live player competition (pvp I suppose) with chat. If you like tetris trust me, you will not be able to stop playing this.... There are also several old style single player games....
http://www.tetrisfriends.com/
Bonus, when a commercial tries to play (happens every 4 or 5 games usually) just hit refresh and it will bring you back to the game, no need to pay for an account to avoid commercials..... I haven't told anyone else because I don't want them to fix it....
Online Tetris
Moderator: Crow