Oh Factorio <3
I bought this game by chance on Steam because I've seen it among the most selling games for a long time. I'm not really into indie-games with so-so graphics and clunky UIs so i remember i hesitated a bit before buying it.
But i do not regret this, right now i have spent 607 hours in the this wonderful world of factory building and I will probably spend a few more hundred hours as long as they keep updating the game.
I have tried to describe why I like this game so much and I think it's much because nothing is hidden. In most management games resources are just numbers and icons and they flow between your buildings without your involvement. In Factorio you have to handle everything by yourself and you can see exactly where your bottlenecks are and you can always fix it. There are no artificial limits or anything, the only thing stopping you is more or less how big of a factory your CPU can handle.