Shin Megami Tensei: Synchronicity Prologue is a Metroidvania platformer fangame produced by Team Ladybug, but was given official support by Atlus to help promote the updated version of Strange Journey. You have somehow acquired a 'Synchronicity' program and activate it. After a nasty glitch, you take control of a Jack Frost near a research station in Antarctica.
Unfortunately, the game was made available only in Japan, from October 2017 to December of the same year. However, fans are still distributing the game around, together with an english translation patch.
Shin Megami Tensei: Synchronicity Prologue provides examples of:
- Beast Man: J, the mysterious, overweight, animal man wearing a suit. Turns out to be a famed programmer by the name of Jones, who was mentioned in the newsfeed from the game's start.
- Boss Rush: Occurs in Area 5, before the Final Boss.
- Bittersweet Ending: You destroy the rampaging Black Frost, but despite his calculations, J ends up perishing.
- Bullet Hell: Black Frost, Alilat, and the Card Soldiers summoned by Alice will unleash waves of fire and ice bullets.
- Call-Forward: A minor one happens during the Carina shopping area, where you can find a second Jack Frost in hiding, saddened that Black Frost killed his family and friends, and looking for a Frost Vest to protect himself and seek revenge. This is the same Jack Frost who the protagonist of Strange Journey can find in the same sector, still searching for the same piece of armor. Fans remember him best for being the source of a Disk One Nuke by trading said vest with him.
- Foreshadowing: Being a prequel to Strange Journey, it's to be expected, but the game tries its best to be as vague as possible regarding these. For example, the broken terminal screen at the starting point confirms that the wreckage at the background is from one of the Advance Research Teams mentioned in the main game, sent to Antarctica to study the appearance and expansion of the Schwarzwelt.
- While the Synchronicity program uses a different mechanic, all messages regarding it, mainly the final one, confirm that it is a prototype software to the Demon Summoning Program, made to stress-test how much can human souls interact with demons.
- The fact that you are referred to as "Subject no.2" implies that there was someone before you going through the same paces. It turns out to be J himself.
- Interquel: The story takes place before Shin Megami Tensei: Strange Journey. The Schwarzwelt expedition operation is announced on your computer's news feed during the ending.
- Invincible Minor Minion: Alilats can heal faster than any damage you can inflict at them. Fortunately, they're mostly a stationary obstacle than a proper enemy.
- Make My Monster Grow: The final boss, Black/Jaaku Frost, grows giant upon the defeat of its initial form. Somewhat subverted in the sense that, according to other Megaten games, this is the natural size for Black Frosts in general.
- No-Sell: Just like in other games demons have the power to Null elements. Jack Frost and Jack OLantern null ice and fire, respectively, allowing them to regain MP quicker.
- Not Quite Flight: Pyro Jack/Jack O'Lantern can hover above the ground, so long as there is ground underneath him.
- While not explained outright, lava also count as a surface for his hovering, which is both a big help at the final area, and a necessary ability to reach some secrets.
- Powered Armor: You acquire a beta prototype of the Demonica Armor halfway through the game, allowing you to play as Demonee-Ho. Doing so gives Jack Frost immunity to Poison, and changes his attack to Gun type. You'll need it to do any damage regularly to Black Frost, as he is immune to ice and resistant to fire.
- Shout-Out: Midway through the game it introduces a mechanic of switching between Jack Frost and Pyro Jack to avoid taking damage from bullet attacks that match their own element, a blatant nod to Ikaruga.
- As if Alice's moveset being inspired by her roots this time not enough, she can also attack by throwing two volleys of Kinetic Cards downwards.
- An individual who goes by the nickname of "J" because that's all he can remember about his identity... Sounds familiar?
- The Gnome that you can find at the second sector is pretty much an echo to the Librarian from Castlevania: Symphony of the Night. Even the shelves of books, from where his shop is set, are similar in design!
- Yin-Yang Bomb: Bifrons uses fire magic and ice stalactites as his attacks.
- Quite a few enemies do this, really. Black Frost takes it Up to Eleven.