▶️ Play Signal Storm now — free

Runs in your browser. No download, no account. Endless — how long can you survive?

Signal Storm is an endless decoding survival game. A Morse code drops from the top of the screen while its sound plays; four characters appear below, and you have until the signal hits the ground to pick the right one. It is the receiving-side twin of Morse Runner: instead of producing code, you are reading it under pressure — the exact skill a radio operator uses when copying a live transmission.

How a Run Works

  • Each falling signal shows its dots and dashes and plays its audio — read it or hear it, whichever your brain grabs first.
  • Pick the matching character from four choices before the signal lands. Keys 1–4 answer without touching the mouse.
  • Click the falling signal (or press R) to hear it again.
  • You have three lives and there is no finish line — the run ends when the storm wins.

Waves: How the Storm Escalates

The storm starts gently with only E, T, I, A, N and M in play. Every eight correct answers a new wave rolls in: four more characters join the pool and the signals fall faster. Survive long enough and the full alphabet plus all ten digits are raining down at once. Because the pool grows in the same frequency-based order as our lessons, your personal best wave is a direct measure of how much of the alphabet you truly know at speed — wave 4 means roughly half the alphabet is automatic, wave 8+ means all of it is.

Scoring

A correct catch earns 50 points plus 5 × your current streak, so consistency compounds: a 20-streak makes each catch worth triple. A miss — wrong answer or a signal reaching the ground — costs a life and resets the streak. High scores therefore come from long careful runs, not lucky fast ones. Your best score and best wave are saved locally and shown on the games hub.

Strategy: Ears First, Eyes Second

Beginners read the falling dots visually; that works until about wave 3, when fall speed outpaces visual counting. The players who reach deep waves close that gap by trusting the audio — the rhythm of “dah-dit-dah” identifies K faster than counting three symbols ever can. Treat the visual as confirmation, not the primary source.

Replay is free — use it. Pressing R to re-hear a signal costs nothing while the signal is still falling. A one-second replay that saves a life and a 15-streak is always worth it. The habit also mirrors real operating: asking a station to repeat (“QRS?”) beats logging a wrong callsign.

What This Game Actually Trains

Signal Storm builds receiving speed — hearing or seeing a pattern and knowing the character with no conscious lookup step. That skill transfers directly to copying real CW on the air, to reading blinked or flashed light signals, and to passing the receiving portion of any Morse proficiency test. Pair it with Morse Runner (which trains the sending direction) and Echo Memory (which stretches audio working memory), and you are training the complete loop a real operator needs.

Frequently Asked Questions

How many waves are there in Signal Storm? +
There is no cap — the game is endless. New characters join every eight correct answers until the full alphabet and all ten digits are in play, after which the waves keep getting faster. The run ends when you lose your third life, and your best score and wave are saved.
What's a good Signal Storm score? +
Reaching wave 4 (about 24+ correct answers) means the 14 most common letters are automatic for you. Wave 8 or higher means the whole alphabet is. Because the streak bonus compounds, scores above 2,000 points almost always indicate a long, nearly mistake-free run rather than a fast sloppy one.
Can I play Signal Storm without sound? +
Yes — every falling signal shows its dots and dashes visually, so the game is fully playable muted. But the audio is where the real learning is: recognising Morse by rhythm is the skill that transfers to real radio, so we recommend headphones over muting.
Why do I keep dying at the same wave? +
Each wave adds four specific characters, so a wall at one wave means those particular letters aren't automatic yet. Note which letters kill you, drill exactly those in practice mode, and the wall usually breaks in a session or two.