Factorio developers created a physical 3D-printable model collection inspired by their game, starting from a 2024 playtesting event. The project evolved into a grid-based system featuring 15 model sets with 65 individual models across 247 STL files, focusing on early-game entities like transport belts, inserters, enemies, and furnaces. Models were designed in two versions—high-precision for push-fit assembly and loose-fit for flexible printing—after numerous iterations and prototyping.