Subtension
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About Subtension
Subtension is a story-focused submarine game set beneath the seas of a ruined Earth, where you command a submarine and its crew on missions to save what remains of humanity. You operate the sub's systems, navigate deep waters and take aim at enemy vessels. The problems you encounter call for different solutions, and your choices shape your route through the story and its multiple endings.
Command your submarine
You man the helm, manage the submarine's systems and customize your vessel for the job. The game includes over 20 distinct ship systems, and you can upgrade your submarine after defeating enemy vessels. Your ship's design reflects your capabilities as captain.
A branching story
The fully voice-acted story includes twists and turns, with multiple endings shaped by your choices. Replaying with different decisions lets you experience other outcomes. Reaching port depends on the kind of captain you choose to be.
Key features
- Over 20 fully unique ship systems
- Ship customization and upgrades
- Missions in deep waters
- Enemy vessels to defeat
Frequently asked questions
Yes. Subtension is free to play on Steam, so there is nothing to buy to start playing.
The minimum requirements for Subtension are: Windows 10, GeForce GTX 1060, Intel Core i5-6600, 1 GB RAM, 250 MB storage. It also runs on macOS. The recommended specs are in the System requirements section.
No. Subtension is a single-player game.
Mostly, yes. Valve rates Subtension as Playable on the Steam Deck: it runs, but may need some manual setup.
Yes. Subtension is the full base game. You need nothing else to play it.











