Steam has launched Free to Play (F2P) support on its digital distribution platform. With the launch are five titles, namely Spiral Knights, Forsaken Worlds, Champions Online: Free for All, Global Agenda: Free Agent, and Alliance of Valliant Arms (AVA). These give titles will receive exclusive in-game content for those who try the "F2P game of the day" on Steam. Specific details on the F2P game of the day and their exclusive content will be revealed over the next few days....