The Arrogant Kaiju Princess and The Detective Servant
Released Dec 2023
Living as a servant to the Kaiju Princess in a colorful cohabitation lifestyle! An enriching and exciting time management love development game.
96% positive · 3,597 reviews
Not yet
Released, but content still planned
Medium confidence
Content Planned
Not yet
Released, but content still planned
Medium confidence
Content Planned
Where to buy
Steam $14.99
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Evaluation
The Arrogant Kaiju Princess and The Detective Servant launched on December 20, 2023. It is the first entry in the "Kaiju Princess" series by ARTcelerator, which has since grown into a multi-game franchise.
The most significant signal for this game specifically comes from the developer's 3rd Anniversary announcement post on July 1, 2025. Alongside franchise-wide news, it explicitly announced a Ver. 2.0 free update for this game (referred to in context as "《Kaiju Princess》 Ver. 2.0"), scheduled for Q4 2025. This update was described as adding full Japanese and Chinese voiceovers, a new "Bath Mode," and additional post-game travel events.
The developer has remained actively engaged — the most recent post as of today (June 21, 2026) was on June 19, 2026, promoting a related game in the studio's portfolio. The studio is clearly active and continuing to develop and publish titles. However, none of the posts in the available news confirm that the Ver. 2.0 update for this specific game has actually shipped. Since Q4 2025 has now passed and no confirmation of delivery appears in the news feed, the update may be overdue — but the developer has not commented on a delay or cancellation either.
All DLC (a soundtrack and artbook) were released the day after launch and are complete. The only outstanding commitment is the Ver. 2.0 update promised in the July 2025 announcement.
Evidence
3rd Anniversary post announces Ver. 2.0 free update for this game, including full Japanese and Chinese voiceovers, a new Bath Mode, and additional post-game travel events, scheduled for Q4 2025.
Free DLC released to celebrate the launch of Kaiju Princess 2, delivered as a direct in-game update for players who completed the main storyline.
Content
2 of 2 released · no outstanding content
Details
Developer
Publisher
Mango Party
Achievements
41
Platform
Windows
Controller
—
Steam Deck
Playable
Players
Single-player
About this game
This is a story about being kidnapped by aliens and coming to an alien planet...
An ordinary detective on Earth, let's call him "the detective", encounters an unprecedented case.
It requires him to... become the pet of Daigneux, an enigmatic and beautiful alien girl!
This blonde girl may look sweet and pretty, but she's got a savage streak underneath, and has no respect for any lifeforms. She even has the ability to summon an army of powerful monsters!
Daigneux, who has a long criminal record for destroying several planets, is the infamous Celestial Tyrant!
Under her tyranny, how will the protagonist use his wisdom to survive?
As a pet, the only way for him to improve his standing is to... conquer planets?!
His job duties: serve Daigneux, exercise, and command monsters!
As a weak, pitiful, and helpless Earthling who can't do anything but eat, the only rule he needs to survive on this alien planet is...
Leech off Daigneux as much as possible!
In the game, players take on the role of a detective that was kidnapped by aliens to serve Daigneux, the beautiful Celestial Tyrant.
The detective must improve his relationship with Daigneux through interacting with her, completing conquest missions before their deadlines, and tending to her “special needs” before she goes to bed.
But he must also train during his spare time to improve the abilities of the monsters that are linked to his mind, so that they can take on the various factions on this planet!
The Celestial Tyrant may not be reasoned with, but once the detective improves his relationship with her... maybe he'll get to see a different side of her?
During his conquests, the planet, which seemed ordinary at first, always yields minute details that pique the detective's interest.
The secrets that lie behind it will be exposed with Daigneux and the detective's arrival...
✦ Takes place in the same universe as Kaiju Princess
✦ Fully voiced dialogue in Japanese
✦ A light-novel-style storyline
✦ Lively and dynamic animated graphics
✦ Immersive management-style game mechanics
✦ A rich variety of outfits to change into
✦ Better H-Scenes, featuring more positions than Kaiju Princess
✦ A uniquely charming cast of beautiful characters
✦ Exquisitely illustrated H-scenes and CGs
Are these done yet?
Last evaluated Jun 21, 2026
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