The Calendar Killer belongs to the game's newspaper-story thread. The notes below describe that story separately from the doppelgangers and the Entity; the developer announcements checked do not explain a connection between them. Use the section links to reach the Calendar Killer or ending information directly.
Creatures of unknown origin that impersonate specific named people. They have spread through the population widely enough that organisations now exist to track and kill them, and they come into the store wearing identities that are on file in your own database.
Sources: In-game database and store description
A spider-like being of abnormal size, and the consequence of failure rather than a random encounter. A doppelganger you fail to catch goes and alerts it, and it comes to the store at the end of the shift. Murals of it appear in the game's own artwork, implying something older than the gas station.
Sources: In-game
A killer referenced in news reports who strikes on the eighth of each month and kills eight people, attacking across six consecutive months. In December the attacks stop, and the absence is treated as its own kind of news.
Full The Calendar Killer guide →Sources: In-game news articles
The primary game mode, running a fixed sequence of nights toward a conclusion. Finishing it is the unlock condition for Endless Mode.
Sources: In-game
Completing Story Mode unlocks this beta with infinite nights. The separate mode guide covers continuing after an ending and preparing for forest threats.
Full Endless Mode guide →Sources: Bun Muen official FAQ
The premise the game gives you is small: work nights at a gas station, check IDs. The story is what leaks in around the edges of that job.
The game is direct that nobody knows where they came from. What it does establish is scale — they spread among people across the world, and the response was organised. Special organisations now exist to track them down and kill them, which is the context that explains why a gas station clerk has an ID scanner, a customer database and a gun behind the counter.
They do not invent identities. Every doppelganger impersonates a specific real person whose details are already in the database you are checking against. That detail matters more than it first appears: it means the system you use to catch them is the same system they use to get in. The people whose identities get worn this way are the customers who come through the door.
The Entity is where the game stops being a screening puzzle.
It is described as spider-like and abnormally large, and it is one of the main antagonists — but it does not show up on a timer or a random roll. A doppelganger that gets past your register goes and alerts it, and the Entity arrives at the store at the end of that shift.
That chain is the game’s central piece of design. The punishment for a bad call at the counter is not immediate, is not obviously connected to the customer you waved through, and does not arrive until the night is nearly over. You find out you were wrong at the point where it is too late to be right.
Murals of the Entity appear in the game’s artwork, which places it as something that predates the store rather than something the doppelgangers summoned.
Short answer: this is a background news story, rather than a boss fight documented by the developer announcements checked for this page. Those announcements do not identify the killer or explain a connection to the Entity.
The summary below follows this wiki’s earlier in-game newspaper notes. The newspaper pages have not been re-captured against the current build, so the details are historical notes rather than a new version check.
Running underneath all of this is a news story the game never resolves. A killer strikes on the eighth of every month and kills eight people, and has done so across six consecutive months. Before each attack a news article goes out and residents are told to stay indoors and limit outdoor activity.
Then December comes and nothing happens, and the town starts wondering where they went.
The Calendar Killer is mentioned, not fought. Whether the pattern connects to the doppelgangers or to the Entity is left where the game leaves it.
The True Ending is documented, but the sources checked for this page do not provide a complete ending count or a route for each ending.
The achievement list includes True Ending. The developer’s 20 August 2026 update also says product prices were equalized to reduce randomness in reaching it. Neither gives a complete ending route. The the achievement list and what it settles is worth reading before trusting any page that maps the endings out in detail.
Completing Story Mode unlocks the Endless beta, which the developer describes as infinite nights. The Endless Mode unlock and survival guide covers the public post-story continuation screen, first-shift preparation and the dated changes to cameras, Rakes and patience.
Developer announcements were checked on 9 October 2026. The latest returned post was dated 1 October; the latest gameplay update was 1 September 2026. That update adds customers and changes Endless Mode, but does not explain the Calendar Killer. For the practical survival sequence, use the walkthrough; for the wind-up-box reports, use the Marionette music-box section.
Yes. The developer's FAQ describes a 13-night Story Mode. Completing it unlocks the Endless beta, described as infinite nights; the separate mode guide covers how to continue after an ending.
The True Ending achievement is documented, and the developer's 20 August 2026 update changed product prices to reduce randomness in reaching it. The checked announcements do not give a complete ending count or a step-by-step ending route.
A spider-like creature of abnormal size, and one of the game's main antagonists. It does not wander in on its own — a doppelganger that escapes your register goes and alerts it, and the Entity arrives at the store at the end of that shift.
A background killer described in this wiki's earlier in-game newspaper notes. Those notes record an eighth-of-the-month pattern and a pause in December, but have not been re-captured against the current build. The checked developer announcements do not identify the killer or connect them to the Entity.
Nothing at the counter, which is the trap. It leaves with the other customers and alerts the Entity, and the consequence lands at the end of the shift instead of the moment you made the mistake.