RealArcade

RealArcade (Formerly RealOne Arcade) was a gaming service run by RealNetworks that sold casual-style computer games to individual users. Its purpose was to let users download demo versions of games and optionally buy the full versions. As of November 2009, GameHouse, a subsidiary of RealNetworks, offers full versions of some of its games, supported by in-game advertising.

Source : IGDB