Rusty Key

Rusty Key is an item in Pathologic 2. It was obtained from a box in Isidor's house for a quest on Day 2 of The Haruspex's route. It can be used to open the door into an abandoned room in the Factory, leading to the Haruspex's Lair. It has since been replaced with the Note signed by Vlad Jr in the full release of the game. The Rusty Key is accessible only through console commands.