Round Out Your Square Head: The Book of Difficult Problems Includes instruction manual Box is not included. *Can also be played on Game Boy Color and Advance, but colors may change. Operation confirmed [Product Contents] - Round Out Your Square Head: The Book of Difficult Problems (DMG-BD4J-JPN) - Inner box, instruction manual - Complete Strategy Guidebook - "Square Head, Round Problem Book" *Please see the first photo for details. We ask that only those who understand retro games purchase this item. As this is an old item, we cannot offer any guarantees after purchase or shipment. We do not accept returns to prevent fraud. Please check the condition carefully in the photos before purchasing. If there are any parts you are concerned about, please feel free to comment and we will add more photos. This has been stored at home for a long time and is inspected by an amateur, so please refrain from purchasing if you are concerned. Please also check out our other games.