Online game rental service Gamefly is now offering members unlimited PC play for over 300 titles with new titles coming in very soon.

You have to download the Gamefly client to your PC or Mac, which is still in beta, and the other catch is that you have to have an actual Gamefly membership rather than merely having an account.

But you have a plethora of titles to play for free in between you sending your games out and waiting for them to arrive!