
Screenshots

Watch trailer on Steam ↗O2
Beyond StarZ · Published by Beyond StarZ
Content notice: This game contains horror themes, suspense, darkness, unsettling environments, and frightening imagery. Players may experience tense situations, feelings of isolation, and encounters with mysterious creatures. The game does not contain sexual content, drug use, or graphic depictions of violence.
Last updated 27 Sept 2026
A short deep-sea horror game where you explore a dark and mysterious ocean, photograph strange discoveries, and uncover what lurks beneath the depths.
£2.65
Lowest price we've ever recorded
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Price history
Adventure, Indie, Simulation · 2026 · More under £5 games
About this game
About This Game
O2 is a deep-sea horror exploration game where every breath matters.
You descend alone into the dark depths of an unexplored ocean. Armed with only a camera, a map, and a limited oxygen supply, your mission is simple: locate designated coordinates and capture photographic evidence of what lies below.
As you venture deeper, the ocean becomes increasingly hostile. Visibility fades, strange sounds echo through the darkness, and something unseen may be watching from beyond the reach of your light.
Manage your oxygen carefully as you navigate the abyss. Every photograph brings you closer to completing your mission, but also drains valuable resources needed to survive. Getting lost, running out of oxygen, or lingering too long in the darkness can turn a routine expedition into a desperate fight for survival.
Will you uncover the secrets hidden beneath the waves, or become another lost soul swallowed by the deep?
Features
Explore a dark and mysterious underwater world
Complete photography objectives at designated coordinates
Manage a limited oxygen supply
Navigate using a map and compass system
Atmospheric deep-sea horror and tension
Immersive first-person exploration
Uncover the mysteries hidden in the abyss
The deeper you go, the less alone you feel.
System Requirements
Will my PC run this? →Minimum
- OS: 10/11
- Processor: Any made within the last decade
- Memory: 1 MB RAM
- Graphics: Any made within the last decade
- Storage: 500 MB available space
- Sound Card: any
- Additional Notes: You can run this
Supported Languages
*languages with full audio support
Latest news
Patch NotesOfficial
Nightmare Mode Update
Welcome to the latest O2 update!This update introduces Nightmare Mode, a brand-new way to experience O2 for players looking for a greater challenge. Along with the new mode, we've made various gameplay improvements, fixed bugs, improved performance, and polished the overall experience.Read full article on Community Announcements (Top4Tv)Patch NotesOfficial
Nightmare Mode Update
Added Nightmare Mode for players seeking a greater challenge. Improved gameplay balance and immersion. Fixed various bugs and performance issues.Read full article on Community Announcements (Top4Tv)






