Don't know if anyone's looked at this yet, an intresting space sandbox game, not a true voxel-based game more of a random-sized-block-based game.
Yes it is another early access type thing, but as with the better ones there's already modding support and mods out there, plus there's a free demo.
There is multiplayer, the single player is basically setting up a local server and connecting to it.
The graphics are rather old looking but there is something about them I like, it's connected to the fact that if you were building actual spaceships that never go into atmosphere then they'd be lots of blocks and simple shapes bolted together.
It's all OpenGL based and doesn't work too well on intel IGP, at least not on this HD3000 (i5-2500k igp)
Free Demo on the dev site https://www.avorion.net/demo/
There's a couple of decent let's plays on youtube, https://www.youtube.com/user/Lathland https://www.youtube.com/user/StoneLegionVideos
It's a bit bare bones now I think but I can see a heck of a lot of potential and modding should open it up even more.
One to keep an eye on me thinks.