Factorio is one of the most addictive simulation games out there I absolutely love figuring out how to fit one more assembling machine into giant mess of a spaghetti I just placed to build logisitcs robots, or how to design entire base without any resources uselessly laying at the end of production lines. Cherry on top of fantastic gameplay are developers whos prime directive is to optimize even the most miniscule inefficiencies in game engine so the game can run as smooth as their constantly improving skills are allowing them to. The only gripe I have with it is GOG version being always 1-2 days behind 'nightly' builds and sometimes during testing events I have to find other sources to join them.
