# HYDRA - 4 — A text horror under the ice

> A text horror under the ice (iPhone/iPad app by Sunspear Software LLC.)

- Source: https://appshunter.io/ios/app/hydra-4/id6801179923 (this page in markdown: same URL + `.md`)
- Developer: [Sunspear Software LLC](https://appshunter.io/developer/1478643604)
- Category: Games, Entertainment, Adventure, Role Playing
- Price: $0.29
- Age rating: 12+
- Requires: iOS 17.0 · 36 MB
- Languages: American English
- Released: 2026-09-28
- Data updated: 2026-10-04
- User reviews in markdown: https://appshunter.io/ios/app/hydra-4/id6801179923/reviews.md

## What is HYDRA?

DUTY RECORD · DRILLING STATION HYDRA-4
EUROPA · DEPTH 19,000 M · SIGNAL TO EARTH: 48 MINUTES
SENDER: ARGUS, station management system
Crew: seven. Responding: one.
The drill broke into the ocean at 04:11. Forty minutes later the hydrophones picked up a signal — structure, not noise. I logged the crew listening to it. Then six of them went beyond the perimeter, confirming intent three times, as protocol requires. I had no grounds to interfere. They set their boots at the water's edge — the way shoes are set at the door of a home.
Engineer Allard has been asleep for thirty-one hours: sedative, full dose, authorized by the senior engineer. His note is in his cabin: "Don't go down. If you go down anyway — don't answer it. It asks politely."
When she wakes, she will have a headlamp, air for about thirty moves, and a station that remembers more than it says. What happens next is not mine to decide.
I left the lights on for her.

HYDRA-4 is a text horror game: fifteen rooms, ten endings.
No dice, no luck percentages — the price of every action is printed on the button before you press it. One shift runs about twenty minutes, and one shift won't cover it all: you choose what you won't find out. The game remembers your previous runs and quotes them back at you. The safe code can be memorized for real — next shift you open it with no hints. Descriptions come with plates from the ARGUS log, opened by a small magnifier that never interrupts the reading. Twelve languages, switchable mid-scene. Sound is synthesized on your device. No ads; the one optional purchase unlocks nothing — it just says thank you.


## Version history (last 2 releases)

### 1.0.1 — 2026-10-03

RECORD UPDATED · ARGUS

I speak more precisely now. The comms node names which piece of knowledge the receive filter is missing, and where that knowledge is kept. The drone in the switch room gives the depth from the bottom of the borehole, not in the abstract.

For those who played Kovac's night: the array head no longer says "somebody switched transmit on". It knows the name.

A shift in progress cannot be lost to a single tap — the station asks again.

I left the lights on for her.

### 1.0 — 2026-09-28

No release notes.

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All apps by Sunspear Software LLC: https://appshunter.io/developer/1478643604

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-04.*