NIKKE: Hell Directive

"This isn't our war, but we have no choice."

A former elite commander from Super Earth, codenamed Alistair, fails a mission to defend Super Shanghai due to circumstances beyond his control, then accidentally transmigrates to the world of NIKKE. Here, humanity has pinned its hopes on the NIKKE, tactical android girls, to defeat the machine lifeforms known as "Raptures" and reclaim the surface.

But this world's dark side is every bit as bad as Super Earth's. (Note: You might as well skip straight to the side stories. The main plot is just window dressing, and nobody likes reading the exact same main story anyway.)