Chemistry 14

Lore & Background

In the world of Factorio, the Chemistry tree is the backbone of industrial progress. What begins as simple iron smelting and copper wiring evolves, tier by tier, into a sprawling network of chemical reactors, oil refineries, and circuit fabrication lines. By the time a player reaches Chemistry 14, the landscape is dominated by towering assemblers, rivers of sulfuric acid, and the hum of electric engines driving every belt in the complex. Chemistry 14 sits in the shadow of the space age. The science packs it demands—space science packs—are produced by machines that themselves require components unlocked in the upper tiers of multiple other trees. This creates a beautiful interdependence: the player must have balanced progress across the entire technology web, not just a single branch. A factory that rushes Chemistry 14 without the supporting infrastructure will find its research lab starved of the very packs it needs. For many players, Chemistry 14 is the moment the game's difficulty curve steepens noticeably. The research time stretches, the science-pack requirements climb, and the factory must be running at peak efficiency to keep the lab fed. It is the last 'easy' chemistry tier before the final, most demanding node of the tree.

In Their Own Story

The research lab's progress bar crept forward one percent at a time, each tick accompanied by the soft chime of a completed science pack slot. Outside, the factory hummed its endless song—pistons slapping, belts whirring, the low growl of electric engines that had replaced the old steam turbines months ago. Mara wiped her hands on her coveralls and stared at the screen. Chemistry 14. Fourteen. One more, and the tree would be complete. She could almost taste the final node, Chemistry 15, waiting like a locked door at the end of a very long corridor. The space science packs arrived in steady streams from the production line to the east, little blue-glowing vials sliding along a conveyor and dropping into the lab's input slot with a satisfying clink. She watched the counter climb. The lab's light shifted from amber to a cool, steady white. The progress bar filled. A soft, almost musical tone rang out across the factory floor. Chemistry 14: complete. Mara exhaled, leaned back in her chair, and for a long moment just listened to the factory breathe.

Reader's Guide

Chemistry 14 is a single research node in the linear Chemistry tree. It requires Chemistry 13 to be completed first and, in turn, unlocks Chemistry 15, the tree's final entry. There is no branching within the Chemistry chain—each tier is a strict prerequisite for the next—so the player must complete all 13 prior tiers before this node becomes available. The research cost for Chemistry 14 is paid in space science packs, placing it firmly in the late-game tier of the technology web. Producing space science packs requires components from multiple other trees (including the Space Age and Robotics trees), meaning the player must have a broadly balanced factory rather than one optimized for a single branch. In practice, this node often requires the player to upgrade their science-pack production lines to higher tiers to keep the research lab fed at a sustainable rate. In terms of progression, Chemistry 14 typically sits after the player has already unlocked most of the mid-game and late-game items in the tree. It is one of the last research nodes to complete before the factory enters its endgame phase. Players often research it alongside other late-game nodes in parallel trees, since the science-pack requirements overlap and the factory's production capacity must support all of them simultaneously. Blueprints do not directly interact with the Chemistry tree, but they are essential for managing the factory scale that Chemistry 14 demands. Experienced players use shared blueprints from the community to lay out efficient space science pack production lines, reducing the manual planning burden at this stage of the game.

Did You Know?

• The Chemistry tree is strictly linear—there is no branching, so Chemistry 14 cannot be researched without completing all 13 tiers before it.
• Chemistry 14's science-pack requirement (space science packs) means the player must have made significant progress in at least two other technology trees before this node is practically reachable.
• Many players describe Chemistry 14 as the 'penultimate grind' of the Chemistry tree, with Chemistry 15 being the final, most demanding research node.
• The Chemistry tree is one of the core trees that every player must complete to unlock the full range of items needed for the game's endgame objectives.