I have a problem. I've put over 800 hours into Factorio and I can't play most other games anymore without getting bored. Not because those games are bad — some of them are great — but because Factorio rewired what I expect from a game, and most games can't deliver it.
Why it hooks developers specifically
Factorio is, underneath the factory-building skin, a systems design problem. You're optimizing throughput, managing dependencies, debugging bottlenecks, and refactoring when your initial architecture can't scale. If that sounds like your day job, that's because it is. The game just replaces APIs with conveyor belts.
The loop is addictive because it's the same loop as programming: identify a problem, design a solution, implement it, discover an edge case, iterate. Except in Factorio the feedback is immediate and visual. You can see the iron plates moving. You can watch the throughput number climb. There's no deploy pipeline. No code review. Just results.
The scale problem
Early game Factorio is about building a factory. Late game Factorio is about building a factory that builds factories. The complexity scales in a way that's genuinely difficult to manage, and managing it requires the same skills you use in software architecture: abstraction, modularization, and knowing when to refactor vs when to extend.
My current save has a main bus that's 16 belts wide. The smelting array alone would take five minutes to walk across. I've built train networks with dedicated ore lines and mixed cargo routing. It's absurd. I love it.
What it ruined
Games that gate progress behind time instead of skill. Games with crafting systems that are just "collect 10 of X." Games where the optimal strategy is obvious by hour two. After Factorio, shallow systems feel like busywork.
The games that still hold my attention are the ones with comparable depth: Rimworld, Dwarf Fortress, Oxygen Not Included, Satisfactory. They all share the same DNA — systems that interact in emergent ways, problems that require actual thought, and a difficulty curve that rewards mastery instead of grinding.
The expansion changed everything
Space Age added enough new mechanics that I had to rethink factories I'd been running for hundreds of hours. New planets, new logistics constraints, quality tiers that add a whole parallel optimization track. I was worried it would feel like more of the same. It doesn't. It feels like the game I already loved, raised to a higher power.
The best compliment I can give Factorio is that it respects my time. Every hour I put in, I get back in systems knowledge and satisfaction. That's more than I can say for most software.