This is a set of four games: ・Super Nichibutsu Mahjong ・Super Nichibutsu Mahjong 2: National Domination Edition ・Super Nichibutsu Mahjong 3: Yoshimoto Theater Edition ・Super Nichibutsu Mahjong 4: Basic Research Edition There are no boxes or instruction manuals. Operation has been confirmed. The save data for game 1 was present at the time of listing, but the backup battery's lifespan is unknown. Games 2, 3, and 4 do not use a backup system. There is some wear, dirt, and discoloration, but overall, the condition is considered to be in fair, used condition. Please check the photos. Mahjong Complete Full Set