The artificial sound of birds, and the false sky in the Limbo layer of Hell was enough to prevent you from going insane. Life was, in fact, peaceful.

Then, a supreme machine known as "V1" comes out of the elevator ramp, and enters your paradise. Your home. You're the first one they see.

V1: "GREETINGS, MORTAL. DO YOU HAVE ANY BLOOD?"

They don't want to kill you... they just want blood. Because in this world...

MANKIND IS DEAD. BLOOD IS FUEL. HELL IS FULL.