Games for Windows – Live is an online gaming service for Windows-branded PC titles. It enables Windows PCs to connect to the Microsoft Live service. Users, each with their own "Gamertag", the Microsoft username service for gaming that began with the Xbox Live, are able to play online, keep track of their friends' status, send and receive messages, gain and keep track of Achievements and associated Gamerscore, voice chat across platforms, and much more.

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