I've played a lot of games in my life and usually can sustain interest in one for a few months max before it gets old and I move on. Factorio is different. I first got this game in 2016 and was obsessed. I am still obsessed. I go a couple months without playing here and there but the factory always calls me back. If you buy this game prepare for a lifelong obsession. You may lose friends and relationships, but the factory must grow.