Sub Terra

First-person psychological horror about an underground maintenance job gone wrong

artescape · Released Aug 15, 2025

Reviews: Very Positive; 92% of 99
Recent reviews: Not enough recent
Players: 0; daily peak, Oct 28, 2026
Steam Deck: Untested
Last update on Steam: 1 year ago; Aug 18, 2025
Minimum PC: DirectX 11 GPU; 8 GB RAM · 10 GB disk; Full requirements

What is Sub Terra?

Sub Terra is a free, single-player psychological horror game played in first person. As a maintenance worker whose water-line repair goes wrong, you explore underground tunnels and other locations along a linear route, piecing together clues about a buried tragedy.

For you if...

+you prefer horror games you can finish in one sitting

Not for you if...

−you avoid jump scares, loud noises, or flashing lights

What players say

92% of 99 reviews are positive

Players praise the scares and variety of settings. Some find the story weak or too obvious.

Screenshots and trailer

Sub Terra system requirements

Minimum: DirectX 11 GPU, 8 GB RAM, 10 GB of disk space.

As published by the developer.

Can my PC run Sub Terra?

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Minimum

OS: Windows 10 or higher
Processor: Quad-core Intel or AMD 2.5 GHz or superior
Graphics: Any DirectX 11 or 12 compatible card
Memory: 8 GB RAM
Storage: 10 GB available space

Does Sub Terra have co-op or multiplayer?

No: single-player only, no multiplayer modes declared.

Single-player

Does Sub Terra 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: 4
Steam features: Family Sharing
Languages: Full audio: English.

Does Sub Terra 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 27, 2026. How to filter AI games on Steam