Belts of Iron challenges you to build a sprawling automated factory while defending it from waves of aggressive robots. Developed and published by Builderment LLC for release in 2026 and currently in Early Access, this action indie simulation strategy game combines the joy of conveyor belt logistics with real time tower defense. You start with a basic mining drill and a single furnace. As you extract and refine iron, you unlock more complex production chains, from steel beams to electronic circuits. The latest version of the game introduces a combat robot that you can pilot directly, letting you join the fight when your turrets are overwhelmed.