In the last four years this is the only game, and I mean the only game, I've spent more than 500 hours playing. And that despite the fact that some of the balancing isn't right yet and there is a lack of endgame content. This game is simply AMAZING! What makes this game so great for me is that is has different stages. In the beginning all work is done by yourself which is ok but gets repetetive soon. Then you start getting automation going and you let the assemblers do the basic and annoying stuff for you. Research gives you new building options and products. And while you expand your factory further and further you might enter a stage where armies of robots can do almost everything for you. It is so satisfying! The development so far has been an example of 'how you do early access right'. All Alpha versions I've played so far (and I've been playing Factorio since 2012) have been remarkably stable. This game is definitely money well spent.
