Underhalt

About Underhalt

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.