Tecmo announced the details for Quantum Theories release date and limited edition.



Game will be released on both Xbox 360 and ps3 on March 25 2010.

Quantum Theory Limited Edition will include the soundtrack of the game and a voucher code to unlock an extra character . The current release date pertains only to Japan, as of now the North American and Europe territories are still TBA.

gotten from http://www.justpushstart.com/2...-contents-announced/



My take on this.
Remember to choose to own the limited edition wisely.
Because the unlockable character will be made DLC a month later with a price point.

Soundtrack, you can listen to it online.