Difficulty is tempo, not health
In most games “harder” means enemies hit harder. In Dome Keeper the dominant lever is time. The gap between waves is a base value (60) grown by a progression term that scales with how much of the map you have cleared, and then shortened by difficulty — each difficulty level multiplies the interval by roughly 1 - difficulty × 0.1.
That has a counter-intuitive consequence: the more you clear, the longer the base gap grows, but the higher your difficulty, the harder that gain is erased. Difficulty does not make monsters unkillable; it makes the night come sooner and more often.
What this means for play
- Don’t out-dig your defence. Pushing deep feels productive, but if your dome cannot survive the now-shorter nights, the extra ore is wasted.
- Read the ratio, not the wave. The real difficulty meter is how much of a day a single night consumes. When a wave eats an entire day’s haul, you are behind.
- Difficulty punishes greed most. Because it compresses the interval, the “one more tile” habit that ends beginner runs gets worse as you climb.
When a run is lost
A run is lost the moment a wave costs more than a day can earn back. You will feel it before you see it: you spend the whole day repairing, the wave still lands, and the dome drops a little further each night. At that point no single upgrade rescues it.
Note what was missing — usually a damage gadget, a delay gadget, or an economy gadget (Condenser + Resource Converter) — and buy that first next time. The gadgets guide shows which slots actually matter.
Related guides
- Waves Guide — how nights escalate and how to plan a day around them.
- Gadgets Guide — slot economy and the defence picks that matter.
- Resources Guide — turning iron and water into a stable economy.