Yesterday, on a friend's recommendation, I got Astroneer.
It's an engrossing little casual space survival/mining/building sandbox game that is, by far, the least complex and least challenging of the "space survival" genre that I have played. It has charming aesthetics and simple controls, and the most noteworthy aspect of it is its 100% voxel-based environment that can be manipulated by your terrain tool. For example, where I landed suffered frequent sandstorms, which can be fatal if you're caught in them unprotected, and even if you yourself are safe, the wind can blow around your stacks of resources. I had started out just digging a big pit and throwing things in it until I needed them, but as the number and variety of my collected resources increased, the pit became a time-consuming inefficiency, so I used my terrain tool to fashion a solid stone warehouse/shelter (this happen at about the 2 hour 20 minute mark, in the video), which not only kept me safe during sandstorms but let me pile my belongings in organized piles. For which my stream watchers mocked me on more than one occasion
Anyway, you can dig anywhere, and build anywhere, and you go about harvesting resources to try to expand your base and research new items, facilities, and vehicles. Eventually you can research and build spaceships that will let you go to other planets (and the planets have different themes, like desert, irradiated, moon, etc), and it also has co-op multiplayer. The planets generally have an impressive tunnel network underground, as well as mountain ranges and valleys, and it feels a lot more rewarding to dig around in the middle of nowhere than it did in either Space Engineers or Empyrion. But, just like minecraft, NEVER DIG STRAIGHT DOWN! Also, every single indigenous lifeform seems to want to kill you, though they are all mercifully sessile.
As it is alpha/early access, there's still quite a few glitches in it and there's no endgame to speak of, nor even a player narrative. It's just, here's a world, do what you will. The research mechanic is irritatingly random (you don't get to pick your research, you just find a researchable object and drag it to a research bench, and get a new thing at random) But I don't begrudge the 13 bucks I spent on it (I caught it on sale, it's usually $20), and I still plan to go back and play it more to try and get the research things I'm missing.