

Switching to Jack o' Lantern allows hovering slightly above the ground. Initially the player can only control Jack Frost but very quickly it will rescue Jack o' Lantern to join. The game is a 2D platformer with the classic rule of the player character taking damage when it comes in direct contact with the enemy.

The credits show a list of world news, including the death/recovery of a famous programmer (depending on the ending), a mysterious blizzard in Antarctica, and the formation of the Schwarzwelt Joint Project. They realize destroying Black Frost is the only way to send J-kun back.Īfter defeating Black Frost, J-kun appears, revealing Black Frost to be the missing part of his mind, and asks the Jacks to destroy Black Frost to release him, hopefully to return to his human body. After defeating the latter, the Jacks meet again with J-kun, who tells them he's remembered he used to be human, until he booted up a synchronicity program sent to him, sending his mind into the body of a demon in the Schwarzwelt. The Jacks traverse the different Sectors of the Schwarzwelt to defeat Black Frost, fighting against Bifrons, Decarabia, Alice, and Girimehkala on the way. They meet a small creature who names himself J-kun. He rescues the non-synchronized Jack o' Lantern after he was frozen by Black Frost, who decimated all the Jacks that previously attempted an assault. Taking place shortly before the events of Shin Megami Tensei: Strange Journey, Jack Frost is synchronized with the mind of a human in order to traverse and fight demon hordes.
