Johnny Turbo's Arcade: Gate of Doom

According to an ancient legend of the Kingdom of Etrulia, should the people get corrupted by wickedness, demons and devils would break through the Gate of Doom, ruling the land as their own. However, by the same time four heroes with different powers would be summoned by the Force Divine to destroy the monsters of darkness and using the magic gem and magic crown they would try to lock the Gate of Doom forever.