Rock Band Unplugged, the first portable version of Rock Band and the spiritual successor to Amplitude and Frequency, is going to be launching in North America and Europe on June 9 of this year.  It will also be the first game to feature a fully-featured in-game store for the PlayStation Portable.

Guildford, UK., 8th April- Harmonix, the world’s leading developer of music-based games, MTV Games, a part of Viacom’s MTV Networks (NYSE: VIA, VIA.B), and distribution partner Electronic Arts Inc. (NASDAQ: ERTS) announced plans today to release Rock Band Unplugged exclusively for the PSP (PlayStation®Portable) system. The game will be available in North America and Europe beginning June 9, 2009, with software retailing for £24.99 in the United Kingdom.
“Rock Band Unplugged reinvents band gameplay while staying true to the authentic feel of the Rock Band console games,” said Bob Picunko, Senior Vice President of Electronic Games for MTV Games. “Harmonix delivers innovation with every game they develop and we are excited to continue our long-list of industry firsts with the Rock Band in-game wireless music store on the PSP system.”
Rock Band Unplugged creates a full band experience in the palm of your hand by combining traditional beat match gameplay with key elements from both Rock Band and Rock Band 2, such as overdrive and chords. Your hands are the “peripherals” in Rock Band Unplugged, allowing you to take direct control of the lead/bass guitars, drums and vocals. In addition, players can expect a rich Rock Band experience with fully functional modes like World Tour, Band Survival and Warm Up and a robust character creator for full customization.

Rock Band Unplugged will feature over 40 master-recordings including nine exclusive new songs that will debut on the PSP system before being offered as downloadable content for console versions of Rock Band. Plus, Rock Band Unplugged will include the first fully-featured in-game store for downloadable content on the PSP system in the North American and European markets, leveraging the PSP system’s wireless capabilities. The in-game store will be powered by PlayStation®Network, and players will be able to use their existing PlayStation Network account to purchase tracks, similar to the Rock Band console experience. PSP system owners will also have the option of purchasing tracks via PlayStation®Store on the PC.

The following tracks will launch exclusively through Rock Band Unplugged on the PSP system for a limited time before becoming downloadable content for the other platforms:

• 3 Doors Down - "Kryptonite"
• AFI - "Miss Murder"
• Alice in Chains - "Would?"
• Audioslave - "Gasoline"
• Black Tide - "Show Me the Way"
• Blink 182 - "What's My Age Again"
• Freezepop - "Less Talk More Rokk"
• Jackson 5 - "ABC"
• Tenacious D - "Rock Your Socks"