In its bid to make the PC a more full-featured gaming platform, Microsoft today launched its Games for Windows Live Marketplace, a platform that will provide game demos, videos, add-on downloadable content and will eventually sell full games.

The Marketplace is part of the latest version of GFW Live, which can be downloaded from Microsoft’s website. You will be able to launch Games for Windows as a stand-alone program after installing it. Windows XP users will need to download a hotfix update for the software to work.

There isn’t much content on the platform right now save for game demos of Viva Pinata and Kane & Lynch.