|Launch date||March 24, 2010|
|Platform||Xbox 360 (Xbox Live), Windows (Games for Windows)|
Game Room is a gaming service for the Xbox 360 video game system, Microsoft Windows PCs, and Windows Phone 7. Launched on March 24, 2010, Game Room lets players download classic video games and compete against each other for high scores. Players on both Xbox 360 and Windows PCs access Game Room through their respective versions of Microsoft's Live online services (Xbox Live and Games for Windows – Live).
At the 2011 Consumer Electronics Show, Microsoft announced a mobile version of Game Room for Windows Phone 7. Asteroids Deluxe is the only game announced so far, but a show floor demo revealed working prototypes of Centipede and Shao-Lin's Road.
The Game Room front end can be downloaded at no charge from Microsoft's Marketplace online storefront. When launched, players are presented with a three-story virtual video arcade, each story containing four separate rooms. These rooms may be decorated however the player wishes, using the included themes and set pieces. The player can fill the rooms with virtual game cabinets that are used to play arcade and console games downloaded through the service, with each room holding a maximum of eight cabinets.
Games for Game Room are made available through downloadable "game packs." While the game packs are free to download, individual games must be purchased in order to be played fully. Players may play each game in the game pack once without charge, limited to ten minutes of game time. Games are purchased on a game-by-game basis, which allows unlimited play of the game.
Previously, this was limited to Xbox 360 or Games for Windows, but a recent update has removed this distinction, defaulting the game purchases to the previous 'Play Anywhere' model.
Games in Game Room are launched by selecting them while players browse through their arcade. Each game offers a "classic mode", where you can set a number of gameplay options, dependent on its format. Arcade games have DIP switches that may be changed in order to increase difficulty or offer additional lives to the player, while console games have their original gameplay variations. Both are accessible using Game Room's on-screen interfaces.
Also, some games can be played in a special "ranked mode," which allows scores to be posted to online leaderboards while limiting gameplay options to a single variation common to all players, as well as disallowing several Game Room options, seemingly to prevent falsifying rankings or other forms of cheating.
While browsing their arcades, players will see avatars of themselves and their online friends wandering around and playing the games; Xbox 360 players will see their console avatars, while PC players see generic avatars instead. Similarly, players may visit the arcades of their online friends as well as play the games found there. If a friend's arcade has a game that the player does not own, the player may purchase plays or may use their in-game "tokens." However, the player may play copies of a game they already own for free. Players may also challenge their friends at various games in both score-based and skill-based contests.
During gameplay, players win medals based on their score or how long they have played the game (both for that individual play and all-time on that game). Medals are offered in gold, silver and bronze, with each being worth a certain number of points. As players earn medals, they can advance in levels, which will unlock new themes and set pieces to be used in their arcades. Like other LIVE titles, players also earn achievements based on their gameplay.
Game selection 
The initial game pack releases for Game Room are a mix of arcade, Intellivision, and Atari 2600 games. Other arcade machines will also be covered with Microsoft promising at least 1000 virtual arcade cabinets over the next three years. Despite Microsoft's promise, there has not been any new games or other content since Game Pack 13 was released on December 22, 2010. Initially, Microsoft announced plans to release game packs weekly, starting on April 28, 2010, although the first new release did not take place until May 5, 2010.
- Fried, Ina (2010-03-24). "Xbox Game Room launches, but with issues". CNET News. Retrieved 2010-03-25.
- Cohen, D.S. (9 January 2011). "CES 2011 – Microsoft’s Retro Game Room Announced for Windows Phone 7". About.com. Retrieved 9 January 2011.
- frankcifaldi (8 January 2011). "Game Room for Windows Mobile 7 Demonstration from CES 2011". 1Up.com. Retrieved 9 January 2011.
- Plunkett, Luke (6 January 2010). "Xbox Game Room To Feature "Over 1000" Classic Arcade Games". Kotaku.com. Retrieved 26 March 2010.