๐ŸพAH Wiki

Ratthew in Animal Hospital โ€” Storyline, Key & the Room 5 Safe

The little black rat who stares at your cameras is not an anomaly โ€” he's the game's most important informant, and the questline he leaves behind unlocks the deepest piece of lore in Animal Hospital (Anomaly).

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Written by Riley Nook ยท Last updated July 11, 2026
This update: in-game mechanics cross-checked against community wikis and player reports

Quick facts

Appearance

Small black rat โ€” white muzzle, buck teeth, curled pink tail

First appears

Around Shifts 2โ€“4, then roughly five visits across your run

Anomaly?

No โ€” explicitly not an anomaly, despite the camera staring

Leaves behind

A key to the Room 5 safe, and a note

๐Ÿญ The storyline, visit by visit

  1. The anonymous patient.He checks in without giving his name โ€” "being small has its advantages."
  2. The name reveal. He introduces himself as Ratthew and admits it hurts that everyone treats him like an anomaly.
  3. The warning. He tells you to trust no one in this hospitalโ€” he chewed up classified documents in Ron's office and doesn't regret it.
  4. The confession. He uncovered a government secret and is being hunted for it. He mentions his missing twin sister Rattinaโ€” "the smart one in the family" โ€” who worked at Animal Corporation before she vanished.
  5. The goodbye. On his final visit he says he has to disappear, and leaves you a key and a note at reception โ€” the note says he lifted the key from one of the doctors.

๐Ÿ”‘ The key and the Room 5 safe

Room 5 is at the far back-right of the hallway. Remove the cat posteron the wall and a hidden safe appears โ€” Ratthew's key opens it. Inside:

  • A photo of Rattina
  • A suitcase stamped TOP SECRET
  • A note: "The experiment was a success. The shadow now sees everything."

The community widely reads that note as the origin story of the Stalker โ€” and the suitcase matches the ones Dr. Harlow and Ron from Accounting carry, tying all three storylines to the same Animal Corp experiment.

๐Ÿ’ก Practical bonus

While Ratthew is in the office, he warns you in red text whenever an anomaly approaches check-in โ€” a free second opinion during some of the game's trickiest shifts. Let him stay.

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Storyline verified against community data. Last checked: July 11, 2026.