The story takes place in Sector City, an island brimming with an unknown energy. It was once a well-known tourist area with many visitors every year... until the accident happened.

The Narumi Detective Agency received a mysterious email, a request to look for a "Doctor Aida". An initial investigation leads Shotaro to Sector City, where he encounters a mysterious warrior bearing the letter X.

Who is Doctor Aida? And what happened during the accident?

Teaming up with OOO and Zero-One, the Kamen Riders work together in the name of justice to uncover this mystery. The battle for humanity against those who bring harm to it begins now.
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So we have a new character, Doctor Aida and a mysterious warrior  bearing the letter X. Who are these two individuals ? Are they both connected ? Is Aida the mysterious warrior ? Who knows BUT SOON everything will he revealed......which means we have to wait for October 29.

The game will also be localized in English and release in Southeast Asia, simultaneously with the Japanese release. The game's pre-order bonuses come with three special taunts (one for each character) and four additional equip items that increase experience points and Rider Power in battle.

Special taunts eh ? Devil May Cry-inspired perhaps ?
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memory of heroez is an action-adventure game played from a third person perspective. Players control either Zero-One, OOO, Double, or Joker as they traverse through an open world environment. Like Grand Theft Auto V, players can freely switch between these Riders at any time. The game utilizes a chain combat system not dissimilar from the Battride War series. Chain attacks build Rider Power, which is used to execute much more powerful attacks and allow for better evasion.

Support items such as Memory Gadgets and Candroids play a major role in the game, acting as special items for the Kamen Riders.