Game Boy software. This is a sale of the Monster Maker 2: Ur's Secret Sword software only. I have confirmed the initial operation on my own Game Boy (this does not guarantee operation on all consoles). The condition is old, so there is a feeling of use. The overall condition is not good! There are scratches, dirt, damage, stains, yellowing, etc.! Please be sure to check the condition! (This is just my personal opinion) *Since this is a casual inspection, there may be oversights. *I have stored this personally, so those who are overly concerned about the condition should refrain from purchasing! *Since this is an old item, please consider carefully. *Please understand that this is a used item. *There may be scratches, dirt, damage, stains, yellowing, etc. due to aging. *I would be grateful if you could check the condition in the photos as much as possible and purchase the item after you are satisfied. *This is an as-is sale, so please confirm the condition! *Game consoles etc. are not included. *The battery backup battery life is not guaranteed. *If data remains, it will basically be sent as is. *Returns are not accepted to prevent swapping. Thank you.