Anomalies are the reason every Night At The Infirmary patient needs a deliberate check. The official description confirms that some arrivals may not be what they seem, but it does not publish a complete entity catalogue. Current exact-game community sources describe several warning patterns inside a treatment-room workflow: impossible diagnostic evidence, changes during care, uncertain night-vision observations, shapeshifter-like behavior, and a faceless warning. This hub treats those as a currently documented index, not a complete official list.
Start with warning categories
Diagnostic contradiction
A conscious patient paired with an impossible-looking heart-rate or temperature result is a high-priority warning in current guides.
Treatment reveal
The patient or evidence changes during an ordinary care branch. Stop autopilot and reassess before finishing the requested treatment.
Night-vision observation
Night vision can reveal a hidden presence or movement, but hallucination warnings mean the image should be compared with another category.
Shapeshifter-like patient
Later-night sources describe familiar-looking patients whose devices may appear normal while behavior or identity context feels wrong.
Faceless warning
A current Night 2 walkthrough records a faceless visual and cautions against prolonged focus. Its full classification remains unconfirmed.
These entries are patterns that change your next action. They are not permission to invent names for every scare. Describe what contradicted the case, then use the Detection guide to choose the next check.
Use evidence in layers
Begin with the active task and patient context. Review the form or computer when available, inspect the visible condition, and use the requested heart-rate or temperature check. Add night vision when it can answer a remaining question. If a major change happens during treatment, reopen the decision before applying another supply.
No layer is automatically perfect. Around 37°C appears as a community normal anchor, not a published pass interval. A wildly impossible reading is more useful than a borderline value. Night vision can reveal something real or contribute to a hallucination-like scare. Later-night behavior reports make identity and context more important when devices look ordinary.
Detection priority by situation
Respond without overcommitting
Current treatment-room guides identify the wooden crucifix as the anomaly-response tool. Use it only when the game exposes the relevant interaction or the evidence is decisive. Pick it up, approach the active threat as instructed, and watch for feedback before assuming the case ended. This page does not claim a permanent range, channel time, cooldown, or charge count.
After a response, check the task, patient state, bed, form/computer, and cleanup. An exorcism animation is not enough if the objective still expects a final action. See Crucifix for a focused recovery route.
Protect sanity while checking
Do not stare at a known disturbing visual after it stops adding information. Stop repeated night-vision sweeps when the view has answered the question. Keep one active patient so a scare does not leave several incomplete cases competing for attention.
If decision quality drops, return to the task and one objective signal. In a group, have another player read the form or monitor aloud. The Sanity guide covers pacing without treating one community item value as universal.
Night progression
Night 1 community coverage emphasizes diagnostic warning categories. Night 2 adds changed prompts and the faceless observation, while broader community pages discuss shapeshifter-like behavior. Night 3 and Night 4 have official completion badges but no strong current public entity roster.
Do not interpret that evidence gap as “no new anomalies.” It means only that this source build cannot responsibly name or assign them. Follow the current task and update-specific behavior.
Common anomaly mistakes
- Completing ordinary treatment after a decisive contradiction appears.
- Treating every frightening night-vision image as confirmation.
- Assuming one normal reading overrides identity or behavior on later nights.
- Staring at a faceless or disturbing visual longer than needed.
- Assigning a community name to an entity without enough evidence.
- Calling the next patient before the response and cleanup complete.
Anomalies FAQ
Is this a complete anomaly list?
No. It is a currently documented warning index built from exact-game sources.
What is the most reliable tell?
A plainly impossible diagnostic result is a high-confidence community-reported warning. Borderline values and isolated visuals need comparison.
What are shapeshifters?
Current community pages use the term for later-night familiar-looking patients that may not fail normal devices. The exact official name and full rules were not confirmed.
What should I do with a faceless patient?
Capture the observation without prolonged staring, protect sanity, and cross-check the active case. Its full category and outcome are not frozen here.
Where do I learn the check order?
Open How to Detect Anomalies and Diagnostics.
Recommended guides
Choose the guide that matches what you want to do next.
All Anomalies guides
1 focused guides with steps, checks, and current caveats.