Dome Keeper Iron Worms Guide: How to Max Output and Haul Iron

To maximize iron production with Iron Worms in Dome Keeper, bring the gadget back to your dome core, prioritize increasing the worm population before purchasing speed upgrades, and pair your tunnel network with automated transport like the Teleporter or Lift. Because this gadget drops loose iron directly into carved tunnels, managing logistical haulage and balancing defensive wave spending are critical to surviving while the engine ramps up.

Iron Worms Upgrade Progression

Once installed, the Iron Worms gadget spawns biological workers that burrow through nearby subterranean rock layers and periodically deposit raw iron clusters into open paths. Upgrades should be bought in a specific sequence to maximize coverage and return on investment.

Always unlock additional worms before investing in speed. Doubling your active worm population doubles the territory covered across your mine shafts. Once multiple worms are digging, purchase speed upgrades to shorten generation cycles. The highest upgrade tiers require substantial iron or water, but a fully upgraded setup continuously populates your mine shafts with passive iron clusters.

Managing Wave Defense While Upgrading

Over-investing in Iron Worms early can leave your dome vulnerable to incoming monster swarms. To scale your economy without failing combat checks, follow these defensive guidelines:

1. Follow a One-for-One Rule: For every upgrade purchased for your Iron Worms during the first three cycles, spend an equal value of minerals on defensive combat power, such as primary weapon damage (Laser or Sword) or dome shield recharge speed.
2. Monitor the Wave Meter: Check your combat timer before committing iron to worm upgrades. If the alert dial shows an alien wave is more than halfway to your dome, hold your iron in reserve for mid-combat hull repairs.
3. Capitalize on Weak Waves: When early waves consist only of solitary ground walkers or weak flyers, divert all recovered minerals into worm infrastructure while enemy threat levels remain low.

Logistics: How to Haul Worm Iron Efficiently

Because worms drop iron deep within your shafts rather than delivering it to the dome, hauling creates an immediate bottleneck. Use these logistics strategies to keep minerals moving upward:

• The Teleporter: Place a Teleporter base inside the primary worm nesting area. This allows you to warp collected mineral bundles directly to the dome terminal, eliminating long transit runs.
• The Lift: Run your primary vertical Lift shaft directly through the sector where your worms are active. When worms drop minerals nearby, move the clusters into the lift beam to let the Speed Spheres carry them up automatically.
• Keeper Carrying Capacity: If you do not have transport gadgets, invest in Keeper Carry Capacity upgrades over pickaxe strength. Worms handle block destruction and iron generation, making your hauling capacity far more important than manual mining power.

Maintenance and Resource Balance

After maxing out the gadget, your primary role shifts from manual grid-mining to logistics and defense. To keep the setup efficient:

• Patrol Tunnel Perimeters: Worms can burrow into unmapped pockets, leaving clusters out of your normal sightlines. Regularly sweep the outer edges of their digging zones to retrieve stray iron before making deep exploration runs.
• Gather Water and Cobalt Manually: Iron Worms only generate iron. You must still locate and mine Water and Cobalt yourself to sustain combat overcharges, gadget operations, and emergency dome repairs.