Loading…
No choices but deduction. No game over. No multiple endings. A mystery "novel" adventure you can play with the same focus as reading a detective novel. Defy the sun with twenty-six bullets—even if the revolution of the heavenly spheres cannot be stopped.
Price history tracked since Jul 16, 2026 · vs all tracked offers.
Based solely on tracked price history — not purchase advice.
How it worksTracked since Jul 16, 2026.
Steam Train Fest ends
Official stores with direct support.
Try this game before buying.
No Choices But Deduction.
No Game Over.
No Multiple Endings.
Your choices will change neither the story nor the movement of the celestial bodies.
The only thing you can do is pull the trigger—and deduce.
"Crimsooon Sun" is a short mystery adventure designed with a singular concept: "A mystery game you can play with the same level of focus as reading a detective novel."
The story takes place in Shirase, a regional city in the Tohoku region. It begins with the return of Mio Fujimaru, a university student who had been missing for nearly six months. She remains silent about her disappearance. However, a video exhibited at the university festival reveals a chilling sight: Misao being pushed down a wedding aisle in a wheelchair by a mysterious "the Faceless Man," while "the Dual Suns" are reflected in the window.
This is a mystery "novel" adventure. When reading a detective novel, one doesn't always have a perfect, logical solution like the detective in the story. Often, we rely on vague intuitions:
"Something about this statement feels like a lie."
"This person seems suspicious."
"This description might be related to a trick."
Such intuitive reasoning often clashes with traditional game systems that require picking the "correct" choice to proceed.
Inspired by "Mikagura Shojo Tanteidan" (Mikagura Girls' Detective Agency), a classic title released for the PlayStation by Human Entertainment, this game cuts away all unnecessary choices and branching paths. Instead, you "pull the trigger" whenever something piques your interest. With the 26 bullets of information you’ve gathered, your only task is to deduce the truth.
Defy the sun with twenty-six bullets.
Even if the revolution of the heavenly spheres cannot be stopped.
There are no specific restrictions. Please treat it as you would a mystery novel.
You can play up to the end of Chapter 1, out of a total of 3 chapters (plus a prologue and an epilogue).
Save data will automatically carry over to the full version.
Please note that achievements are not available in the demo. However, once your save data is carried over to the full game, your achievements will be verified at the title screen.
Lowest tracked price: €2.83 (Jul 16, 2026) · current best: €2.83.
67% positive reviews all-time · 0 peak players in the last 30 days.
Right now the cheapest offer for Crimsooon Sun is €2.83 at Steam. KingsPrice compares 1 offers from 1 stores — official stores and keyshops — and refreshes prices throughout the day.
The lowest price KingsPrice has tracked for Crimsooon Sun is €2.83 (recorded on Jul 16, 2026). This covers the stores and period we monitor — set a price alert to catch the next drop to that level.
Crimsooon Sun peaked at 0 concurrent players on Steam in the last 30 days (highest on Jul 11, 2026). The player chart on this page updates daily.
Create a free price alert on this page and KingsPrice will email you when Crimsooon Sun drops below your chosen price. The biggest discounts usually appear during seasonal Steam sales and publisher promotions — the sale calendar on this page shows the next confirmed event.
