Under Lock

Asymmetric survival horror with a monster that gains power through fear

NioTum · Released Jan 12, 2021 · Early Access

As of Oct 28, 2026: Early Access, no updates for over a year

Reviews: Mixed; 68% of 69
Recent reviews: Not enough recent
Players: 0; daily peak, Oct 28, 2026
Steam Deck: Untested
Last update on Steam: 3 years ago; Oct 26, 2023
Minimum PC: GTX 970; 4 GB RAM · 6 GB disk; Full requirements

What is Under Lock?

In this match-based survival horror game, four survivors search a building for randomly placed keys that unlock an exit or provide access to useful items. Another player controls the monster hunting them. VR play is also supported.

For you if...

+you enjoy coordinating with friends under pressure
+you like monsters with distinct hunting rules and abilities

Not for you if...

−you prefer symmetrical teams with the same objectives

What players say

68% of 69 reviews are positive

Players praise the atmosphere and monster designs, especially Flatface. Recent reviews warn about empty lobbies; earlier reviews also criticize VR controls, inventory bugs, and unreliable door interactions.

Screenshots and trailer

Under Lock system requirements

Minimum: GTX 970, 4 GB RAM, 6 GB of disk space.

As published by the developer.

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Minimum

OS: Windows 7/8/10 (64-bit OS required)
Processor: Intel Core i5-2300 2.8 GHz/AMD Phenom II X4 945 3.0 GHz or equivalent
Graphics: Graphics: NVIDIA GTX 970 / AMD Radeon R9 290
Memory: 4 GB RAM
Storage: 6 GB available space
DirectX: Version 9.0

Does Under Lock have co-op or multiplayer?

Yes: co-op online and LAN; PvP online and LAN. It also has a single-player mode.

Does Under Lock run on Steam Deck?

Untested Not yet tested by Valve on Steam Deck.

PC version details

DRM: None declared on Steam
Controller: Keyboard and mouse
Platforms: Windows
Achievements: 10
Steam features: Family Sharing, VR
Languages: Text only: English, Russian, Simplified Chinese, Ukrainian.

Does Under Lock use AI-generated content?

No AI-generated content is disclosed on the game's Steam page.

Self-reported by the developer under Steam rules: it covers AI content that ships in the game, not tools used to make it. Steam page checked on Oct 28, 2026. How to filter AI games on Steam