HB03 Get ROM ↓

Original Game Boy Advance game · Dive log 03

HUSHBELOW!

The cave is blind until you call into it. Every answer tells the hunters exactly where to look.

Download the finished ROM Hear the rule
Campaign
3 complete dives
Native
240 × 160
Format
GBA / HSHB
ACTIVE SONARABYSSAL BAND
Native GBA gameplay: a cyan sonar ring expands from a yellow research submarine and reveals cave terrain, specimens, and hunting creatures.
Native mGBA framebuffer · shown at 4× · nearest-neighbor

01 · THE SIGNAL

Knowledge travels
both ways.

Coast through almost-black water and preserve your location—or press A. The pulse reveals rock, living samples, and the things between you and the buoy. At that same instant, every hunter turns toward the origin.

PING / REVEALEDFRAME 04

Sonar-active native GBA gameplay with a bright circular pulse revealing the cave.
The image is an actual emulator capture. Toggle the signal to compare the same dive in silence.

02 · DESCENT RECORD

Three dives.
One reply.

  1. I

    The Shelf

    Recover three luminous specimens. Learn how far a safe pulse really carries.

    125 M
  2. II

    The Wreck

    Trace three signal shards through tighter stone and restless water.

    250 M
  3. III

    The Abyss

    Wake a lost transmitter, return to the buoy, and listen to what wakes below it.

    375 M
Dive One briefing screen explaining that sonar reveals the cave and also wakes hunters.
01 Read the water
Dive Log screen recording specimens, sonar pings, collisions, and remaining oxygen.
02 Count the cost
HUSH BELOW! ending screen stating that something far below pinged back.
03 Receive the answer

03 · PILOT CARD

No weapons.
Only judgment.

Free Dive removes the campaign clock. It does not make the water safer.

D-PAD
ThrustMove through four-directional cave passages.
A
PingReveal the cave and give every hunter a target.
B
BrakeKill the engines and make precise one-pixel moves.
SELECT
Dive logInspect specimens, pings, impacts, and oxygen.
START
PauseHold the dive in perfect silence.
HUSH BELOW! title screen with Story Dive, Free Dive, and Sonar Manual options.

SURFACE TRANSMISSION

The finished dive fits in your pocket.

A complete original campaign, Free Dive, deterministic 4bpp art, native PSG audio, dive reports, and an ending—built within real Game Boy Advance constraints.

Take HUSH BELOW! down