The Apothecary Diaries Gets Its First Console Game — How The False Imperial Brother Actually Works

The Apothecary Diaries: The False Imperial Brother is the franchise’s first console and PC game, announced by publisher KOEI TECMO and developer Gust, in cooperation with TOHO Games, during the September 9, 2026 Nintendo Direct. KOEI TECMO’s October 21 announcement dates the release for March 18, 2027 on PlayStation 5, Nintendo Switch 2, Nintendo Switch and PC via Steam.

The core is a brand-new story conceptualized by Hyuganatsu, the original novel author. The poisoned face-powder case shown at TGS is the stated exception to its otherwise original mysteries, rather than evidence that the whole game retells the anime.

The Quick Version

The story: Five Mysteries, Five Curses, and a masked impostor

Maomao — now working in the rear palace after her apprenticeship in the pleasure district — is drawn into two connected chains of incidents: the “Five Mysteries” disturbing the rear palace, and the “Five Curses” spreading fear through the capital. At the center of it is a masked figure who claims to be the “imperial younger brother,” a claim that Jinshi himself disputes. Maomao has to use her knowledge of medicine and eye for detail to work out who this person actually is before, in KOEI TECMO’s own framing, it “destroys the imperial court.”

The current publisher synopsis places the later Five Curses investigation after the Shi clan’s rebellion. That supplies a story landmark; it does not formally settle whether every game-exclusive event belongs to the novels’ continuity.

How the mystery-solving actually works

The game is presented as a mystery-investigation adventure. According to KOEI TECMO’s official description, players:

• Explore locations to gather evidence, examining objects and scenes for clues
• Interview witnesses and organize what they learn
• Craft medicine from ingredients gathered while exploring, tying directly into Maomao’s actual skill set
• Assemble findings into deductions, connecting clues in a notebook to work toward the truth

There’s also a credibility system: giving a wrong answer during deduction sequences reduces trust, and KOEI TECMO says repeated mistakes “may lead you into a dead end” — so wrong guesses have real consequences rather than just requiring a retry.

Platforms, release and languages

The publisher now dates the game for March 18, 2027, across PS5, Nintendo Switch 2, Nintendo Switch and PC (Steam). Gematsu’s October 21 reporting identifies this as the worldwide release date. Exact territory-specific unlock hours are not supplied.

The official US product page lists physical PS5 and Switch 2 versions; Nintendo Switch and Steam are download-only in that market. Gematsu separately confirms physical PS5/Switch 2 releases in North America and Europe, and a physical original-Switch edition in Japan. The Switch 2 physical edition is a game-key card, not a claim that the complete game is stored on the card.

The English-language publisher release specifies Japanese voices and English text. The current Steam language table lists Japanese full audio, with Japanese, English, Simplified Chinese and Traditional Chinese interface/subtitles. It does not list English or Chinese full audio. Our earlier wording incorrectly grouped the text languages with audio support; that is corrected here.

At the October 21 check, Steam’s date field still read To be announced. The March 18 date above comes from the newer publisher announcement and official product site, rather than that lagging storefront field.

Playable Jinshi, Maomao (Cat) and new characters

The October 21 publisher release says players will sometimes explore as Jinshi, whose court position opens conversations unavailable to Maomao, and Maomao (Cat), who can reach high places, overhear conversations and retrieve evidence. These are announced playable investigation roles, not a separate combat mode.

Alongside travelling actor Guanyu, the publisher identifies Yanxi, an official in the Bureau of Court Etiquette known for fortune-telling, and Chenhan, a Verdigris House patron who struggles to defend himself against false accusations. Completing requests builds trust and can unlock character side stories. These are publisher-described systems, not firsthand play impressions.

Early purchase and digital preorder bonuses

The official product page distinguishes an early purchase bonus from a digital preorder bonus. The Starter Kit and Modest Accessory Pack applies to eligible early physical/digital purchases through March 31, 2027; physical buyers must download it by that date. Digital preorders by March 17 also receive the Tasteful Accessory Pack and include the early-purchase content.

Digital Deluxe adds costume/accessory packs. Those extras do not establish different story content, and no regional price is assumed here. Check the publisher’s platform-specific redemption terms before relying on a bonus.

TGS 2026 gameplay shows gathering, compounding and deduction in action

KOEI TECMO ran a stage and live demo for the game at Tokyo Game Show 2026 on September 20, and it’s the first time the gathering, medicine-crafting and deduction systems described above were actually shown running rather than just described.

The gathering demo had players controlling Maomao through a mountain environment, collecting medicinal ingredients. According to coverage of the live demo, materials clustered closely together can be gathered in one action, triggering a short cutscene of Maomao’s reaction. A separate compounding scene showed ingredients being combined and ground into medicine.

For deduction, the demo used the poisoned face-powder incident — the same case that opens the anime’s first episode — as its example. Coverage of the stage is specific on one point worth preserving accurately: KOEI TECMO describes this as the only case in the game that isn’t original; every other mystery Maomao investigates was written for this game specifically. In the deduction sequence itself, players review clues gathered during exploration and choose an answer from a set of options; getting it wrong costs the player’s credibility/life meter rather than simply prompting a retry, consistent with the “wrong answers have consequences” framing from the original announcement.

The TGS demo introduced travelling actor Guanyu alongside familiar figures such as Gaoshun. The October 21 announcement adds Yanxi and Chenhan to that earlier character information, as described above.

What’s still unknown

• Exact regional unlock hours and platform-specific release timing
• Unverified local prices and any further editions beyond the announced range
• How the story’s placement relates to the ongoing novel and anime timelines
• A complete roster and voice cast beyond the characters specifically identified in the announcements

How this fits with everything else

The game is a separate project from the novels, manga and screen adaptations. For how the different versions connect, see our complete Apothecary Diaries format guide. The release calendar records the publisher-announced game date.