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Attendees watch a presentation on video game Battlefield 4 at the Microsoft Xbox E3 media briefing in Los Angeles, Monday, June 10, 2013. Microsoft focused on how cloud computing will make games for its next-generation Xbox One console more immersive during its Monday presentation at the Electronic Entertainment Expo. Microsoft announced last week that the console must be connected to the Internet every 24 hours to operate, and the system would ideally always be online. (AP Photo/Jae C. Hong) ( Games E3 Microsoft )

Victor Kislyi, CEO of Wargaming, announces "World of Tanks" for Xbox 360 during the Xbox E3 Media Briefing at USC's Galen Center in Los Angeles, California June 10, 2013. REUTERS/Mario Anzuoni ( USA/ )

Attendees watch a presentation on the Dead Rising 3 video game at the Microsoft Xbox E3 media briefing in Los Angeles, Monday, June 10, 2013. Microsoft focused on how cloud computing will make games for its next-generation Xbox One console more immersive during its Monday presentation at the Electronic Entertainment Expo. Microsoft announced last week that the console must be connected to the Internet every 24 hours to operate, and the system would ideally always be online. (AP Photo/Jae C. Hong) ( Games E3 Microsoft )

Dan Greenawalt, developer of the video game Forza Motorsport, standing next to a McLaren sports car speak after unveiling Forza Motorsport 5 video game for Xbox during Microsoft Xbox news conference with a at the Electronic Entertainment Expo at the Galen Center on June 10, 2013 in Los Angeles, California. Thousands are expected to attend the annual three-day convention to see the latest games and announcements from the gaming industry. (Photo by Kevork Djansezian/Getty Images) ( 170297677 )

An attendee takes a photo of the XBOX logo during the Microsoft Xbox news conference at the Electronic Entertainment Expo at the Galen Center on June 10, 2013 in Los Angeles, California. Thousands are expected to attend the annual three-day convention to see the latest games and announcements from the gaming industry. (Photo by Kevork Djansezian/Getty Images) ( 170296146 )

A McLaren sports car is unveiled during the announcement of a new video game Forza Motorsport 5 during Microsoft Xbox news conference at the Electronic Entertainment Expo at the Galen Center on June 10, 2013 in Los Angeles, California. Thousands are expected to attend the annual three-day convention to see the latest games and announcements from the gaming industry. (Photo by Kevork Djansezian/Getty Images) ( 170297676 )

Xbox One logo during the Microsoft Xbox news conference at the Electronic Entertainment Expo at the Galen Center on June 10, 2013 in Los Angeles, California. Thousands are expected to attend the annual three-day convention to see the latest games and announcements from the gaming industry. (Photo by Kevork Djansezian/Getty Images) ( 170297949 )

Halo Xbox video game during Microsoft Xbox news conference at the Electronic Entertainment Expo at the Galen Center on June 10, 2013 in Los Angeles, California. Thousands are expected to attend the annual three-day convention to see the latest games and announcements from the gaming industry. (Photo by Kevork Djansezian/Getty Images) ( 170297953 )

A McLaren sports car is unveiled during the announcement of a new video game Forza Motorsport 5 during Microsoft Xbox news conference at the Electronic Entertainment Expo at the Galen Center on June 10, 2013 in Los Angeles, California. Thousands are expected to attend the annual three-day convention to see the latest games and announcements from the gaming industry. (Photo by Kevork Djansezian/Getty Images) ( 170297678 )

Victor Kislyi, CEO of Wargaming, announces "World of Tanks" for Xbox 360 during the Xbox E3 Media Briefing at USC's Galen Center in Los Angeles, California June 10, 2013. REUTERS/Mario Anzuoni ( USA/ )

Halo Xbox video game during Microsoft Xbox news conference at the Electronic Entertainment Expo at the Galen Center on June 10, 2013 in Los Angeles, California. Thousands are expected to attend the annual three-day convention to see the latest games and announcements from the gaming industry. (Photo by Kevork Djansezian/Getty Images) ( 170297948 )

Attendees watch a presentation at the Microsoft Xbox E3 media briefing in Los Angeles, Monday, June 10, 2013. Microsoft focused on how cloud computing will make games for its next-generation Xbox One console more immersive during its Monday presentation at the Electronic Entertainment Expo. Microsoft announced last week that the console must be connected to the Internet every 24 hours to operate, and the system would ideally always be online. (AP Photo/Jae C. Hong) ( Games E3 Microsoft )

Phil Spencer, vice president of Microsoft Game Studios at Microsoft Corp. speaks during Microsoft Xbox news conference at the Electronic Entertainment Expo at the Galen Center on June 10, 2013 in Los Angeles, California. Thousands are expected to attend the annual three-day convention to see the latest games and announcements from the gaming industry. (Photo by Kevork Djansezian/Getty Images) ( 170297709 )

A McLaren sports car is unveiled during the announcement of a new video game Forza Motorsport 5 during Microsoft Xbox news conference at the Electronic Entertainment Expo at the Galen Center on June 10, 2013 in Los Angeles, California. Thousands are expected to attend the annual three-day convention to see the latest games and announcements from the gaming industry. (Photo by Kevork Djansezian/Getty Images) ( 170297679 )

Phil Harrison, a Microsoft vice presdient, speaks during Microsoft Xbox news conference at the Electronic Entertainment Expo at the Galen Center on June 10, 2013 in Los Angeles, California. Thousands are expected to attend the annual three-day convention to see the latest games and announcements from the gaming industry. (Photo by Kevork Djansezian/Getty Images) ( 170297957 )

Halo video game during Microsoft Xbox news conference at the Electronic Entertainment Expo at the Galen Center on June 10, 2013 in Los Angeles, California. Thousands are expected to attend the annual three-day convention to see the latest games and announcements from the gaming industry. (Photo by Kevork Djansezian/Getty Images) ( 170298056 )