Jarnasmal

🎮 This is the free demo. If you enjoy it, the best way to support the game is to wishlist Jarnasmal on Steam

Your Signal is Your Survival.

Bullet hell meets network engineering. Your high-tech blaster requires a live connection to your ground station — and every wall, corridor, and cavern in the underground facility blocks your signal.

📶 Strong connection — endless ammunition, maximum damage, maxed-out skills.

📉 Weak connection — your gun stalls, your abilities degrade, your explosions shrink.

❌ No connection — your blaster is dead, and a melee shovel is your only weapon against the horde.

Build the Ultimate Mesh Network

You can't just run and gun — you must plan. Strategically place signal repeaters to forge a path through the depths. Every single wall matters. Repeaters provide your damage buffs, health, ammunition, and line of sight.

Deep Tech-Tree Upgrades

Calculate optimal combinations to unlock unique boosts. Multiply repeater effects, or push their radio performance with higher power, wall penetration, and directional antennas.

Overwhelming Odds

You are outnumbered 1000 to 1 in your fight for the ultimate underground loot. The deeper you go, the deadlier the tech turned against you: enemies climb walls, place mines, flood rooms, and deploy heavy tanks. Prepare to dodge thousands of projectiles.

Do you have the strategy to keep your signal alive — or will you be left in the dark with nothing but a shovel?

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In the demo: 5 minutes tutorial plus ~20 minutes of gameplay in the Underground Temple biome. (The shovel hasn't dug its way into the demo yet — for now, when your signal dies, so does your firepower.)

💬 Found a bug or have feedback? Leave a comment below — I read everything.