Night At The Infirmary Anomaly

Night At The Infirmary anomaly list

Night At The Infirmary anomalies are entities posing as injured patients. They register at intake, lie on your beds, and sometimes survive multiple treatment steps before vitals or body horror expose them.

Unlike a simple reject-at-the-window horror game, anomalies in Night At The Infirmary interact with the full medical loop — IV, monitors, casts — until you stop and exorcise them with the wooden crucifix.

This hub tracks anomaly types, tells, night introduced, and counterplay for Beta UPD 1. Pair it with how to detect anomalies and Night guides.

Lists will expand as UPD 2+ adds entities. Names like Sylvester ("main event") appear in footage — we note them when mechanics are confirmed, not just flavor text.

Anomaly types at a glance

Beta UPD 1 footage confirms several categories. Use the table as a ward cheat sheet — not every spawn fits one row, but tells repeat enough to learn.

Vital-sign anomalies (Night 1 core)

The teaching anomalies on Night 1 usually fail heart monitor or temperature checks while still talking. Flatline BPM on a conversational patient is the classic screenshot moment.

Temperature anomalies may feel cold while complaining, or run burning hot while looking pale. Always compare to the ~37°C anchor the tutorial mentions.

These are the honest anomalies — devices work as intended. Learn them before Night 2 teaches lies.

Workflow: register → bed → IV + monitor → temperature → cast or crucifix. Never cast when vitals fail.

Mid-cast and event anomalies

Some anomalies pass initial vitals then break during treatment — faces distort, bodies contort, or audio stingers fire when you set limbs or dip fiberglass.

Bell rings, power flickers, and hallway shadows often precede these reveals. Re-check monitor the moment a scare triggers.

If a patient looked fine at intake but warps mid-cast, abandon the cast workflow immediately. Players who "finish for fun" lose Sanity fast.

Cleaning bed stains after bad events can restore Sanity — see sanity guide.

Shapeshifters (Night 2+)

Shapeshifters are the headline Night 2 anomaly type. Supervisor briefing: they may look like your buddy, you, or patients you already treated earlier the same night.

They do not register as anomalies on heart monitor, temperature, or other devices. The game forces instinct play — dialogue slips, wrong names, forgetting words, impatient tone, or movement that does not match injury.

Community footage shows shapeshifters passing BPM and temperature while feeling "off." You may need to deny at intake when behavior screams wrong even if tools stay green.

Shapeshifters are S-tier difficulty on the tier list because they break the Night 1 vitals crutch. Read Night 2 guide before facing them.

Faceless patient warning

Night 2 briefing adds a specific rule: if a patient does not seem to have a face, do not look at them for too long.

Faceless arrivals tie into Sanity pressure — prolonged camera stare drains your bar and can trigger possession-adjacent horror.

Detection workflow: brief glance → decide deny/treat/exorcise → act without zoom-staring. This is separate from shapeshifters but often appears the same night.

If you are unsure whether lack of face is a render glitch or real tell, prioritize Sanity preservation over curiosity.

Banishing anomalies

Every confirmed anomaly ends with the wooden crucifix — perform an exorcism to banish it. Voice lines joke about "exercise," but mechanically you are removing the entity, not healing bone breaks.

Successful banishment shows clear feedback (anomaly banished). Failed attempts waste seconds while other patients queue and Sanity ticks down.

Some anomalies require exorcism twice or fight back with possession — stay calm, restore Sanity if vision warps, then continue the queue.

Tool reference: items hub. Detection reference: how to detect anomalies.

FAQ