block-steam-generator

The Steam Generator is a mid-game power-producing building that converts combustible fuels and water into electricity. It is more compact and efficient than individual Combustion Generators when replacing multiple units: a single Steam Generator produces roughly 5.5× the power of one Combustion Generator running the same fuel, though it consumes fuel about 25% faster due to its shorter burn cycle. Steam Generators require a steady water input (from surface water or pumps) and will accept several fuel types; power output and burn order depend on the fuels loaded.

Steam Generators interact with the early and mid tech tree as a bridge between simple combustion power and later reactors. They can sustain an entire base’s power needs up to the point where Thorium Reactors become available; if Thorium is inaccessible, the Differential Generator is another long-term option. Shallow Water can be supplied directly from surface pools or via Shallow Water Extractors — an extractor only needs a small external power source to start up, because the Steam Generator can then power it for steady operation.

Practical usage and behavior:

• Fuel priority: when multiple fuel types are present, the generator burns the lowest-flammability fuel first (resulting in lowest power). The documented priority is Blast Compound > Coal > Spore Pods > Pyratite. This can be advantageous (for example, avoiding burning coal that could be more profitably made) but requires care if high-damage fuels like Blast Compound appear on the same supply line, since generators will still accept and be damaged by Blast Compound even if other fuels are available.
• Fuel processing synergy: spore pods are an effective fuel, but processing them into oil and then converting that oil into coal yields roughly twice the coal output per pod — meaning it can be more efficient to convert pods into coal, then burn coal in generators, at the cost of more infrastructure and space.
• Shallow Water and power balance: a Steam Generator running on coal can produce enough power to operate three Shallow Water Extractors plus a Cryofluid Mixer while also supplying enough water for itself and the mixer. This enables localized Pooled Cryofluid production wherever titanium and combustible fuel exist.
• Placement and defense: Steam Generators are prime targets for enemy Flares. The air path to a generator should be covered with a layer of Scatters or otherwise protected because damage to a line of flammable blocks can cascade into catastrophic fires. A common defensive trick is to place empty Combustion Generators closer to spawn points to draw attackers away from the steam plant.
• Startup considerations: if no surface water is present, pair a Water Extractor with a small initial power source (a single Solar Panel or a Combustion Generator) to bootstrap the Steam Generator; once running, the Steam Generator can sustain the extractor and the rest of the system.

Noted balance changes in past updates include a reduction of base power from 360 to 330 and an increase in water consumption from 3 to 6 (version 6.0), though version histories are incomplete in some records.

For players planning base progression, Steam Generators are a versatile, space-efficient option for early-to-mid power that pairs well with fuel-processing chains and small-scale water infrastructure, but they require mindful fueling and defensive layout to avoid self-damage and enemy focus.