Ultraopolis

Ultraopolis is the name of the human utopia built by Connor The Echidna. He built the place to protect humans after a group of Robots destroyed the Angel Island.

Ultraopolis has some simalarites to Neo Arcadia in the Megaman Zero Series.

Similarites: Both are built by Non-Humans to protect Humans, both are targeting some robotic creatures. (Robots for Ultraopolis, Reploids for Neo Arcadia).