How to Detect Anomalies

How to detect anomalies in Night At The Infirmary

Spotting anomalies is the core skill in Night At The Infirmary. You are a doctor first — patients enter the ward, you register them, and treatment begins with IV lines and monitors. Detection happens during care, not at a reject gate.

The supervisor tutorial names three primary tools: heart monitor, temperature, and night vision. Two are reliable; one is situational. When vitals fail, you stop medical treatment and use the wooden crucifix to banish the entity.

This Night At The Infirmary detection guide walks through each device, the order to use them, Night 2 shapeshifter exceptions, and what to do after you confirm an anomaly.

Full type list: Night At The Infirmary anomalies. Practice on Night 1 before trusting yourself on harder shifts.

Heart monitor tells

The heart monitor is usually the dead giveaway according to in-game briefing and verified gameplay. Connect it after IV setup whenever the UI allows — you want BPM on screen before you commit to cast steps.

0 BPM (flatline) on a patient who is talking to you is an obvious anomaly. So are absurdly high readings — community footage references joke values like ten billion beats per minute. Normal injured humans stay in a plausible living range.

Some anomalies hide normal BPM briefly then spike when you start limb setting. Re-check after jumpscares or bell rings. If the number changes impossibly between clicks, treat that as confirmation, not a UI bug.

Shapeshifters on Night 2 may keep plausible heartbeats. Never let a green monitor override behavior that feels wrong — see shapeshifters below.

Temperature probe tells

The temperature gun or probe checks body heat against a familiar baseline: roughly 37°C for a normal patient (standard human body temperature).

Readings far above or below that band — freezing cold on a patient complaining of fever, or scorching heat on someone who looks clammy — mean the same thing as a bad heartbeat: anomaly.

Temperature is your second confirmation. Use it when BPM looks fine but the room feels wrong, or when night vision showed something odd you are not sure about.

Device order from footage: heart monitor first, temperature second, night vision last. That sequence minimizes false panic from hallucination overlays.

Night vision — use with caution

Night vision goggles sit in the treatment room for darker moments. The tutorial explicitly warns they are less consistent than vitals.

They can reveal entities, weird patient movement, or things plain sight misses. They can also show hallucinations — fake shapes that are not tied to the real anomaly flag.

Rule: night vision supports a diagnosis; it does not replace heart monitor and temperature. If goggles show horror but vitals read clean on Night 1, finish vitals workflow before exorcising.

On Night 2, clean vitals plus creepy goggles may mean shapeshifter. Pair goggles with dialogue tells and the faceless rule — do not stare at missing faces.

Step-by-step detection workflow

Use this Night At The Infirmary checklist every patient until muscle memory forms:

1. Register the patient and move them to the treatment bed.

2. Connect IV and heart monitor — read BPM immediately.

3. If BPM is 0 or impossible, skip cast steps and exorcise.

4. Temperature scan — compare to ~37°C normal band.

5. If temperature fails, exorcise before wrapping cast.

6. Optional night vision sweep if vitals pass but behavior feels off.

7. Complete treatment (limb set, stockinet, cotton, fiberglass cast) only when vitals pass.

8. Watch for mid-procedure changes — anomalies reveal during cast steps often.

Deny registration at intake only when the game offers it and the patient is obviously wrong before bed work. Most detection still happens in-room.

• Do01Register → bed → IV + monitor
• Do02BPM plausible?
• Do03Temperature near 37°C?
• Do04Night vision if unsure
• Do05Cast OR crucifix — never both on anomalies

Night 2 shapeshifter exception

Shapeshifters arrive on Night 2+. They may look like friends, your character, or patients you successfully treated earlier in the same shift.

Critical mechanic: they will not show as anomalies on devices. Heart monitor and temperature can read clean while dialogue, movement, or missing faces betray them.

Detection shifts from "read the monitor" to "trust instincts": weird speech patterns, forgetting words, wrong names, or patients who should not be back yet.

If a patient has no face, glimpse once — do not stare too long. Prolonged focus drains Sanity and triggers worse events per supervisor warning.

Deep dive: anomalies hub · Night 2 guide.

After you confirm an anomaly

Stop cast steps. Pick up the wooden crucifix. Perform the exorcism interaction when prompted — players describe it as "exercise" in voice lines, but the goal is banish, not heal.

Successful banishment feedback confirms the anomaly is gone. You may need to clean the bed or restore Sanity before the next patient.

Failed or delayed exorcisms cost time while the queue grows. Some entities possess the camera or jump between bodies — if possession happens, stabilize Sanity before continuing.

See items for crucifix context and sanity guide if horror effects stack.

Common detection mistakes

Finishing casts on bad vitals — biggest Night 1 fail. Wrap only humans.

Trusting night vision alone — hallucinations cause false exorcisms and wasted Sanity.

Ignoring mid-cast BPM spikes — anomalies reveal during limb setting; re-check monitor after scares.

Device worship on Night 2 — shapeshifters break the Night 1 workflow on purpose.

Staring at faceless patients — detection becomes self-sabotage via Sanity drain.

Skipping temperature because BPM looked fine — double confirmation catches edge cases.

FAQ