These are game cards released by Sega for arcade games in the late 1980s. They are commemorative items, so they may have some rarity. They have been opened once to check the contents, but are unused. However, they are currently of no use, so they are collector's items. There are two types: SPACE HARRIER and FANTASY ZONE. There is some damage due to aging, and some tape peeling. Please understand. If you are interested, please consider purchasing them.