From cannon fodder to sweeping across thousands of stars

"Dignity is only on the edge of the psychic light blade, and truth is only within the range of the super-heavy purification beam."
The chaotic situation made Amber, who traveled into the space hegemony game "Starry Sky", completely understand this sentence...
Humanity, who accidentally acquired the jump technology, quickly spread across the galaxy like a plague.
After hundreds of years of all mankind working together, division came unsurprisingly.
Of course, there are also 'friendly' alien civilizations and unknown enemies that are ready to move at the edge of the galaxy.
But as a wanted criminal by both the Federation and the Empire, the first thing Amber needs to do is... survive.

Elements of this book: interstellar warfare, fleet warfare, mecha-destroying battleships, individual soldiers joining gangs, spiritual awakening, alien cat girls, alien elves...