The Legend of a Galactic Soldier

[Hard Sci-Fi + Space Opera] In an interstellar age of explosive technological advancement, human society has somehow fallen back into a dark medieval era. But one extraordinary Christmas changes everything. After a new age dawns, an ordinary guard embarks on one extraordinary adventure after another across the vast cosmos.

The story includes hard sci-fi elements, but personal preference means there will also be plenty of space-opera scenes that don't follow hard sci-fi logic.