Outerra

some more news recently (7 feb this year) from developers on the steam discussion page: "Unfortunately we still aren't ready for a generally usable public release on Steam. Open issues:
working AMD OpenGL drivers are not yet available (there are non-public drivers that already work, so it only depends on AMD release cycle now)
server infrastructure for planetary data download VR issues and a bunch of smaller usability issues. The release date will be set when we get closer to resolving these issues. Obviously we'd like for it to be as soon as possible, but we can't promise any concrete date at the moment, sorry. For people that come check here because of the B-17 Bloody 100th - even though both projects use the same underlying engine, their releases are completely unrelated."

"It's basically updated Anteworld sandbox game[forum.outerra.com] with Steam Workshop support and ability to have game mods. VR already works but requires some tweaking and a better controller integration, but yeah, maybe we'll have it in some alpha testing mode initially."