A brand new, unopened Nintendo Ten Billion game released in 1980. It was released to compete with the Rubik's Cube at the time, and had a high level of difficulty with over 10 billion possible combinations. This item has some yellowing on the case due to age, but the product itself is unopened and in good condition. Please check the condition in the images. 【Important Notes ①～⑤】 ① We generally cannot respond to questions or requests after purchase, so please ask everything before you buy. ② The shipping method may be changed between "Yamato Transport ⇔ Japan Post" without confirmation. ③ We may reuse packaging materials. ④ To prevent swapping and trouble, we will record the product condition and the packing process, and store the data until the transaction is completed. ⑤ Please provide a review within 24 hours of receiving the product. If this is difficult, please contact us via the transaction message in advance with the date you can provide a review (excluding official partners). By completing your purchase, you agree to these terms. Also, please refrain from using or re-posting the product description and important notes, regardless of whether they have been modified. Thank you for reading to the end.