Dome Keeper 4-Player Co-Op Guide: Roles, Mining, and Upgrades

To survive four-player co-op in Dome Keeper, divide your team into two forward drillers, one logistics runner, and one dedicated dome sentry. Because alien wave strength and swarm density scale upward with four players, teams that dig without assigned duties suffer from tunnel collisions, cluttered shafts, and chaotic handoffs at the weapon console. Organizing your squad by zone and pooling resources for collective upgrades keeps your base secure while clearing the subterranean map efficiently.

Squad Role Breakdown

Assigning specific tasks prevents players from bumping into each other in narrow corridors, which slows movement speeds and causes dropped materials.

The two forward drillers should focus entirely on breaking rock and revealing veins of iron, cobalt, and water. Instead of hauling ore back to the dome individually, drillers should dislodge the blocks and push them into central junctions. The logistics runner follows behind to gather loose bundles with upgraded carry capacity. Meanwhile, the sentry tracks the incoming attack meter, enters the weapon station early, and handles combat.

Quadrant Mining and Tunnel Spacing

When four players branch out from the central drop shaft, clearing the map in a structured quadrant grid prevents overlapping tunnels and missed mineral deposits.

• Tunnel Spacing: Drill horizontal exploration tunnels exactly two stone tiles apart. This pattern reveals all intermediate blocks without wasting mining stamina on empty rock.
• Drop Zones: When miners hit dense ore veins, push dislodged materials into the central trunk corridor rather than carrying them back to the surface.
• Exit Corridors: Keep the primary vertical drop shaft entirely clear of loose rock clusters so injured or slower players can retreat rapidly when an attack is imminent.

Dome Defense and Wave Coordination

Multiple players should not fight over the primary weapon station. Hostile waves scale in density during multiplayer runs, and input delays caused by multiple players attempting to interact with the station can result in severe dome damage.

1. Enter the Station Early: The designated sentry must take control of the primary weapon console—whether using the Laser or the Sword—several seconds before the wave timer expires to engage flyers and burrowers immediately.
2. Support Without Interfering: Teammates returning during an active breach should stay off the primary weapon controls. Instead, returning players should feed cobalt into the repair terminal or trigger shield upgrades.
3. Provide Threat Callouts: Secondary players in the dome should track fast-moving aerial spitters along the outer shield edges to direct the gunner's aim against blind spots.

Team Upgrade Progression

Distributing minerals equally for personal convenience weakens squad defense. Four players harvest resources quickly, but uncoordinated spending drains iron reserves needed for structural survival. Coordinate team purchases through a tiered priority order:

1. Early Waves (Waves 1–3): Spend initial iron on Drill Strength Tier 1 for both primary miners and baseline movement speed for the runner. Upgrade weapon tracking speed so the sentry can cleanly hit fast aerial targets.
2. Expansion Waves (Waves 4–7): Upgrade primary dome weapon damage to handle larger swarms. Purchase Carry Capacity for the runner to haul heavier loads without friction slowdowns.
3. Deep Excavation (Waves 8+): Unlock Tier 2 and Tier 3 drilling upgrades to penetrate dense lower rock. Reserve water for defensive shielding upgrades, and save all cobalt exclusively for emergency dome repairs.

Transport Gadget Optimization

Deep exploration creates long return trips that can strand miners underground when attacks begin. Deploying vertical transport gadgets resolves this bottleneck:

• The Lift: Install the Lift directly beneath the dome entrance. Miners in deep lateral shafts only need to kick ore into the lifting beam, allowing automated mechanical orbs to carry materials upward while the squad continues mining.
• The Teleporter: Place the primary teleporter base inside the dome and assign the portable pad to the miner working the deepest cavern. This allows that player to instantly return to safety before aliens arrive and immediately warp back to the dig site once the wave is cleared.