Metal all the way here. Been listening to scifi-themed prog and melodic death for some while now. As such, Arien Anthony Lucasen is probably my most listened to musician of the last two years. His headline project Ayreon has a lineup of concept albums, most of them connected on a complex timeline, dealing with various sci-fi concepts.
There’s even a song that I found very fitting, thematically as well as atmospherically, for No Mans Sky (though that particular one isn’t very metal):
It’s about the last human being alive, expecting his death on Mars after the earthlings blew themselves up. So he enters a computer simulation that takes him back through history and finally through the entire universe back to the big bang over the duration of a full double album, where he touches the “universal migrator”, the original soul that became the ancestor of all conciousness in the universe.
Lucasen also has a side project called Star One, which released two albums containing songs inspired by various science fiction films and tv shows. Here’s his homage to the short lived, butt none the less immortal, Firefly:
Imho one of his best, the inspiration of which shouldn’t require an introduction:
On the more extreme side there’s darkest horizon, who released three albums dealing heavily with lovecraftian themes. Somebody made a nice mash-up with one of their songs over Mass Effect 3 footage, with the only ending I will ever accept as cannon: The worst.
Besides that there’s Mechina, Lunar Sea, I spit Ashes, and probably quite a few I forgot.
Oh, and Lascailles Shroud is worth a listen, thhough the only place where I seem to be able to find their album is bloody youtube (in case the name bashes some bell on the back of your skull but you can’t quite remember what it is: It’s from the revelation space series by Reynolds):