Dome Keeper: How to Beat Survival of the Fittest on Challenge

To beat the Survival of the Fittest assignment on Challenge difficulty in Dome Keeper, you must outpace accelerated wave scaling by investing your earliest iron into drill upgrades rather than base defenses. Dig vertical mining shafts spaced two tiles apart, save cobalt exclusively for emergency repairs when your dome flashes red, and eliminate fast flyers and ranged spitters before targeting slow ground brutes.

Early Mining Setup and Upgrade Order

In Survival of the Fittest, mid-tier and elite monsters spawn several waves earlier than in standard Relic Hunt runs. If you fall behind on resource gathering, you will lack the damage required to stop incoming swarms.

To maximize resource extraction during early cycles:

• Establish a strip-mining pattern: Dig vertical shafts separated by exactly two unmined blocks. This exposes every ore deposit across the rock column without wasting time breaking empty stone.
• Ignore early dome upgrades: Your base weapon can handle the first two attack waves without damage upgrades if your targeting is precise.
• Reinvest early iron immediately: Buy movement and harvesting upgrades to shorten the time between digging veins and returning to the dome.

Once you reach the second rock stratum, begin upgrading weapon damage. Harder rock significantly slows mining tempo, making raw weapon output necessary to clear waves before monsters damage the dome.

Defensive Target Prioritization

High-health melee brutes move slowly and take several seconds to reach your dome, whereas aerial and projectile enemies inflict damage the moment they enter the screen. Prioritize targets in this sequence during combat:

1. Fast and Explosive Flyers: Intercept dive-bombing and swarming aerial units first before they hit the dome exterior.
2. Ranged Spitters and Beamers: Target artillery enemies hovering along the screen edges to stop continuous ranged damage.
3. Armored Ground Walkers: Eliminate high-health ground units last once all flying and ranged threats are cleared.

When operating the Laser Dome, keep your beam focused on a single target until it dies rather than sweeping across the swarm. If you use the Sword Dome, launch long-range thrusts into incoming aerial lines, then use blunt deflection to redirect enemy projectiles into packed ground units.

Cobalt Management and Gadgets

Cobalt is extremely scarce under Challenge modifiers. Spending cobalt to fix minor early chip damage creates a deficit that prevents survival during late-game elite waves.

• Save cobalt for critical health: Only repair the dome when its structural integrity reaches critical red levels.
• Deploy utility gadgets immediately: If you find the Shield or Repellent, use them to absorb burst hits or extend mining windows.
• Use the Teleporter: Dropping heavy ore loads and warping straight to the control console removes hauling travel time when the wave alarm starts.

Late-Game Transition

By wave ten, you need Drill Tier 2 and upgraded primary weapon damage. When searching for the final chamber or completing quotas in the third rock layer, stop mining low-yield side veins. Dig directly toward relic indicators and return to the dome console at least five seconds before the combat timer expires to set up defensive fire.