Steam – the best thing to happen to PC gaming since, uhm, anything – has now announced a new flavor of games they’ll support – Free to Play titles – along with the first five titles that have now come to Steam.
Those first five games? Champions Online, Forsaken World, Alliance of Valiant Arms, Global Agenda, and Spiral Knights.
One very nice aspect of all of this is that, due to the Steam support, any purchases you want to make in these games can go directly through your Steam account, without needing any kind of subscriptions or payments made through each individual game.
Source: Steam Free to Play Games Page