Frictional Games often includes subtle nods to their previous works and other horror media.
- Penumbra References: Keep an eye out for mentions or items related to the Penumbra series, Frictional's earlier horror games.
- Developer Jokes: Some hidden notes or environmental details might contain humorous or self-aware developer commentary.
- Historical Figures: The game incorporates real historical figures like Agrippa and Weyer, adding a layer of historical intrigue.
- Hidden Messages: Sometimes, messages are hidden in plain sight or require specific lighting conditions to be revealed.
