Battery to Rocket Part Chain

Lore & Background

On the alien surface, the Battery is one of the first items that reminds a factory-builder that this planet's resources are not infinite in any single form. Iron and copper are abundant, but the red circuits that bind them demand a steady stream of both metals, and the water drawn from the alien lakes adds a logistical thread that stretches back to a pump station. The Battery sits at a crossroads: it is simple enough to produce in a dozen assembling machines, yet it is a prerequisite for so many advanced recipes that a single bottleneck here can stall an entire late-game expansion. The Rocket Part, by contrast, is a monument to interdependency. It pulls in electronic circuits, processing units, accumulators, plastic bars, blue circuits, iron, copper, rocket fuel, and the Battery itself. Every one of those items has its own upstream tree, and the Rocket Part is the point where all those trees converge into a single slot in an assembling machine. In the community's telling, the Rocket Part is less a recipe and more a promise: if you can keep every one of those inputs flowing simultaneously, you are ready to leave. The Rocket Fuel, produced in a Chemical Plant from petroleum and water, adds yet another dimension. It requires a pipeline network, an oil-refining setup, and a chemical plant that must be kept fed. The interplay between the solid-item assembly line and the fluid-processing line is what makes the final push to the Rocket feel like conducting an orchestra rather than simply building a factory.

In Their Own Story

The assembling machine hummed its low, mechanical drone, and the Battery slid into its slot with a satisfying click. Around it, the other components waited in their little hoppers: a processing unit, an accumulator, a blue circuit, a plastic bar, a small vial of rocket fuel that still smelled faintly of hot petroleum. The conveyor belt carried them in a slow, endless procession, and the machine's little indicator light blinked green, then amber, then green again. Outside the factory walls, the alien sun was setting, painting the rocky terrain in shades of rust and violet. Somewhere down the line, a water pump gurgled. Somewhere upstream, a smelter glowed orange. And here, in this small rectangle of ordered machinery, the planet's scattered resources were being woven into the one thing that would let her go.

Reader's Guide

The chain begins with raw mining: iron ore and copper ore are smelted into plates, while crude oil is pumped and refined into petroleum. Iron and copper plates feed into Electronic Circuits (1 iron + 1 copper), which in turn feed Red Circuits (2 copper + 1 iron) and Blue Circuits (2 red + 1 copper). These circuits, along with additional plates, go into the Battery (2 iron, 2 copper, 2 red circuits, 1 water) in any Assembling Machine. In parallel, the Chemical Plant converts petroleum and water into Rocket Fuel. Advanced circuit items such as Processing Units and Accumulators are assembled from electronic and red circuits plus copper plates. Plastic Bars require iron plates and petroleum in an Assembling Machine. All of these converge on the Rocket Part, assembled in an Assembling Machine. The typical bottleneck in a growing factory is the circuit sub-chain (especially Red and Blue Circuits), because they are shared inputs across dozens of recipes. As the factory scales, the petroleum pipeline for Rocket Fuel and the water supply for both Battery and Chemical Plant production often become the limiting factors. Players typically dedicate separate production lines for each major input to keep the final assembly machine starved-free.

Did You Know?

• The Battery is one of the few mid-game recipes that requires Water, forcing players to set up a water pump and pipe network earlier than they might otherwise plan.
• Rocket Fuel is the only major Rocket Part input produced in a Chemical Plant rather than an Assembling Machine, making fluid logistics a critical part of the endgame.
• The Rocket Part recipe simultaneously demands both solid-item assembly and fluid-processed fuel, meaning a player must keep two fundamentally different production systems running in parallel.
• The Battery is not exclusive to the Rocket Part; it appears in several other advanced recipes, so a factory must overproduce it relative to the single Rocket Part line.