What Are The Best Free Games Online?

almostdead writes "CNET has just put up a story about what it thinks are the best online flash games of all time. These include titles like Line Rider, Bejeweled, Desktop Tower Defense and Portal, all of which I enjoy playing a lot. But my thirst for free games is peaking at the moment, probably due to an incredibly boring job and lack of imagination. Can you suggest any more good free games online?" Two words: Puzzle Pirates.