HighFly Studios — happy aviator fly with helmet and goggles
Illustrated dark underwater cave with daylight overhead

A game by HighFly Studios

DEEP
BREATH.

The way down is only half the journey.

A technical cave-diving simulator in development for Windows PC. Explore underwater caves while managing buoyancy, gas and visibility, with an emphasis on calm, deliberate decisions.

Watch early gameplay
In development · Windows PCTitle artwork · illustration, not gameplay

Early gameplay / October 2026

Plan. Descend. Return.

A first look at the underwater journey.
2:03 · Development gameplay · Windows PC

Deep Breath title card over illustrated underwater cave artwork Watch the film

From the descent into darker water to the journey back and preparation for another dive. Recorded in our early development build, with some sequences accelerated for presentation.

Watch on YouTube ↗ · The YouTube player loads when you choose to play.

Music: “The Climb” by Scott Buckley · CC BY 4.0 · www.scottbuckley.com.au. Music edited to fit this video.

01 / The experience

Quiet water.
Meaningful decisions.

In a cave, attention matters. We're building a diving experience where movement, equipment and the environment work together, and getting home is part of the adventure.

01

Find your balance.

Control your buoyancy and fin deliberately. Small adjustments shape how you move through the water.

02

Know your resources.

Check your instruments and keep track of your gas. Pay attention to the choices that leave room for a return.

03

Read the cave.

Follow the route, use your torch and watch your visibility. We're refining the rock, light and water that make the world feel present.

02 / A look below

From the development build.

Screenshots captured during play, 11 October 2026.
Environment, lighting and geometry are works in progress.

Looking up along the orange guideline toward daylight entering the submerged cave, with the diver's torch lighting the right wall
01 / Toward the daylightGameplay screenshot · 11 October 2026
The orange guideline descends between underwater rock walls into darker water, seen through the diver's mask
02 / Follow the descentGameplay screenshot · 11 October 2026
The diver's torch lights the cave wall beside the orange guideline and its 30-metre marker, with daylight overhead
03 / Light the routeGameplay screenshot · 11 October 2026

Instruments and a sense of place

The diver. The location.

The wrist computer and Boesmansgat sinkhole.
Captured during play, 11 October 2026.

A gloved diver checks a wrist computer showing 32.7 metres, return information and a gas-density warning, with daylight entering the cave behind it
04 / Check your instrumentsGameplay screenshot · 11 October 2026
Overview of the Boesmansgat sinkhole reconstruction, with rock walls, vegetation and floating entry markers around the pool
05 / Boesmansgat, above the waterBoesmansgat sinkhole and entry pool — reconstruction in development · 11 October 2026

We are building cave-diving environments based on real-world locations, starting with Boesmansgat in South Africa. These screenshots show the reconstruction in development, including the in-game instruments and notices.

03 / The journey continues

Still taking shape.
Worth following.

DEEP BREATH is in active development for Windows PC. We're continuing to refine the underwater atmosphere, diving systems and interactions.

The prototype focuses on submerged descent and return: manual buoyancy, deliberate movement, torch use and checking instruments. Optional assistance is available as we refine the controls and accessibility.

Follow our progress on YouTube, or say hello on Reddit.

Follow on YouTube Meet us on Reddit
Back above the surface Return to HighFly Studios