In 2065 AD, after the "Bloody Moon" incident, an unknown virus called "Rust" swept across the world. The infected will gradually metallize, eventually turning into lifeless, rust-colored statues. The world's population has dropped by 90%, and the remaining humans huddle in a handful of survivor bases.
But this was not a natural disaster - the virus was originally leaked from the "New World Project" laboratory, and behind this disaster, there was a huge conspiracy to reshape human civilization.
Intention: The end of the world