Super Real Mahjong PIV Custom was released on December 17, 1993 by Naxat Soft.
Originating in the arcades, this installment of the Super Real Mahjong series puts the player in the role of a mahjong club member who competes against three female opponents. Rounds won by the player lead to undressing animations; however, while the computer version has explicit nudity, console versions are censored. All the versions have the same opponents, cutscenes, and gameplay rules. The computer version adds a versus mode in which girls can compete against each other, while the Super Famicom (SNES) version has a so-called "puzzle mode", which reveals parts of a puzzle as the player wins mahjong rounds.
In 2050, after a great earthquake, the Moon got an atmosphere and conditions for normal human life. 50 years later, the Moon is inhabited by humans and a great tourist attraction. A boy called Daichi arrives on the Moon and hears the strange stories about people with rabbit ears. Soon he meets V-Mei, an old witch and her granddaughter Guri Guri, the members of the Long-Ears race which is in war with the evil Jadou Clan who wants to conquer the world. Sensing a power in the boy, V-Mei gives the magic gun to Daichi and reveals to him that he is the chosen Madou Warrior who will save the Long-Ears race and their land Rabiluna from the evil Jadou Clan. With the magic gun, Daichi can summon Granzort – the Madou King of Earth – a giant robot to fight against the monsters of the Jadou Clan.
Soon, Daichi, V-Mei and Guri Guri meet two other boys – Gus and Rabi. Gus receives a magic bow that summons Winzart – the Madou King of Wind, while Rabi receives a magic top that summons Aquabeat – the Madou King of Water.
Taking a fair amount of inspiration from Sega's After Burner II, Battle Ace is a sci-fi based cockpit shooter. Gameplay is purely arcade style, with a standard machine gun and lock-on missiles to take down the enemy aggressors. There's little more to it than that.