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Wikipedia
GameTap was conceived primarily as an online subscription rental service, competing against mail-based services like GameFly. GameTap offers two subscription levels: a Premium subscription with access to the entire content library, and a Classic subscription with access to older console and arcade games running in emulation. GameTap now also sells games via the online distribution method.[2] GameTap initially offered a limited selection of games for free play without a subscription, but this option has been discontinued.
Originally, GameTap was designed to offer not only video games, but a complete media hub (GameTap TV), taking advantage of the TBS catalog as well as offering original video content, including the animated series Re\Visioned: Tomb Raider and new episodes of Space Ghost Coast to Coast. GameTap TV has since been discontinued.[3]