Echoes of the Boundary Break

A cataclysmic event known as "The Great Fracture" tore the fabric of reality apart, causing our world to overlap and merge irregularly and unstablely with countless parallel universes. The earth became fragmented, and different areas showed different world landscapes, physical laws and even intelligent creatures. Old civilizations collapse, and survivors struggle to survive in ruins and exotic landscapes. Advanced technology (pre-disaster legacy or otherworldly technology) becomes the key to survival and struggle, while the nature of the "Great Rupture" and the possibility of manipulating it become the central mystery of the story.