Been absolutely hammering Surviving Mars since the weekend. 40 hours put in in four day... and I'm still on my first go.
I started with the tutorials - which are pretty good - and then moved straight onto my first go at getting a colony up and running. It was all going swimmingly, got up to 500+ colonists and then "things" happened (and I didn't realise that I had no metal until too late) and I was reduced down to just 6 and a single dome! Ffffff... luckily I got a cash injection at that point and started slowly building back up, much more careful and aware of my resources (especially the absolute essentials - concrete, water and metal).
I am now in a position where my terraforming efforts mean that I can plant trees! My research is complete, and yet I still need to keep an eye on those core resources. I think they've built this into a really good complete resource management game. There's no bloat really, typically in these games you get to a stage where you can just leave them running and come back an hour later to a tonne of resources - not in this, you can't leave it alone, when you walk away you pause the game.
Really enjoyable and right up my alley and as is typical of Paradox, best left until you can get a bundle of the DLC to really make the game.