Eudaimonia
A game which stubbornly refuses to kowtow to mainstream genre designations like 'post-apocalyptic', 'science fantasy', preferring to call itself a work of lighthearted mundane fantastic transhuman space opera inspired more by slice of life and action adventure series than the heady and cerebral titans which have defined the genre. Run by Exhack, if you couldn't guess based on the excessively hipster intro line.
Premise
Eudaimonia is a world that was terraformed over the course of thousands of years through concerted effort by a now-defunct human society which at one point had the resources to do so. Its continents are lush and impossibly fertile, weather placid at all times of the year and shallow seas crystal blue and dotted with beautiful little islands and indestructible terraforming stations which are now inhabited by human and transhuman inhabitants which no longer remember their genuine purpose. It is a paradise made by human hands and by human technology, which will likely outlive its creators as the machinery which sustains it will turn until the universe is too large and cold to draw power from.
Although tucked away in some unseeming corner of the universe, it became the battleground of a war between some new agency of humanity calling itself (or perhaps only remember as) the True Human Empire and a nameless and incomprehensible menace called the Mysterious Starfish Aliens some thousand years ago. The remains of their battles, from weapons of incredible power to the laboratories of ships which surpass even the miracles of the builders of Eudaimonia and other things stranger and more alien can be found all over the planet now.
As a scavenger working the tropical oceans, you live an exciting and glamorous life few of your peers dream of, plying the ruins and entering those uncharted sectors of the world for a few untouched scraps of miraculous technology and making some concerted effort at rediscovering the workings behind them. It's dangerous, messy and downright treacherous sometimes when jobs go sour and friends turn on you, but the sights you see and the things you learn along the way make it all worth it.
To say nothing of all the tail.