High Quality Content by WIKIPEDIA articles! Games for Windows – Live (trademarked as Games for Windows – LIVE) is an online gaming service for Games for Windows-branded PC titles. It enables Windows PCs to connect to the Live service, which will eventually include other devices including Windows Mobile and Zune. Users, each with a unique 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. Some games allow for cross-platform play, such as Shadowrun, putting Windows players against Xbox 360 players.