After its announcement last November , Sega revealed a limited edition for Valkyria Chronicles 4 - currently only announced for Japan - to celebrate the 10th anniversary of the franchise, called the 10th Anniversary Memorial Box. The price of this special edition lands at 12,990 yen (around £85) and it will contain a 72-page B5-format book with artwork and images taken from all the chapter of the saga, a CD with 25 tracks from the soundtrack and the DLC Joint Operation With Squad 7, available exclusively with this edition.
At the moment, we don't know if Valkyria Chronicles 4's 10th Anniversary Memorial Box will land in the West, but since the game will be also published over here - although the launch date hasn't been announced yet - it's possible we'll get some sort of limited edition over here as well.
Thanks, Dualshockers.