Family Computer Software Rockman 4 & 6 Set Thank you for viewing. The bottom of the back side has a stain that became shiny after rubbing it with a sticker remover. (See photo) Software operation has not been confirmed. Returns and refunds are not possible due to the software not working. Please purchase only if you understand that this is stored by a private individual. If you would like to see more photos or have any questions, please feel free to ask!