Underhalt
Read the corridor. Survive.
$0.99 · Designed for iPad. Not verified for macOS.
Every corridor is familiar until one detail changes. Observe, classify, and survive twelve increasingly unstable night shifts.
Underhalt is an atmospheric, offline anomaly hunt built around careful observation rather than jump-scare reflexes.
Walk the same subterranean service corridor across twelve night shifts. Learn its baseline geometry, fixture rhythm, signs, doors, and shadows. Then decide: has the corridor changed, or is your own memory becoming unreliable?
FEATURES
- A real-time 3D corridor rendered on device
- Twelve authored anomaly families with multiple variants
- Deterministic shift generation for fair, replayable runs
- A stability system that rewards accurate streaks
- Flashlight management and changing visibility
- A persistent deviation archive
- No ads, no accounts, no in-app purchases, and no network connection
One purchase opens the entire building.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Robert Corbin, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Robert Corbin
- Size
- 79.8 MB
- Category
- Adventure
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
9+
- 9+
- Infrequent
Horror/Fear Themes
- Copyright
- © 2026 Robert Corbin
