It is inhabited by: Anthropomorphic animals (often called "Mobians" by fans, but this is not an official modern-game term) Humans Chao Robots Ancient civilizations Alien visitors Other intelligent life After lore clarifications made through TailsTube and Sonic Team, humans and anthropomorphic animals coexist on the same planet, although different regions are predominantly populated by one group or the other. The Chaos Emeralds The Chaos Emeralds are the most important artifacts in the world. Everyone has at least heard of them. Officially they are described as possessing seemingly limitless Chaos energy. The Emeralds: grant incredible power warp space manipulate time in certain circumstances power ancient technology can fuel entire civilizations allow Super transformations for compatible users They are ancient. Even characters like Eggman continue researching them because nobody fully understands their origin. The Master Emerald The Master Emerald is larger than the Chaos Emeralds. It resides on Angel Island. Its major known abilities include: controlling Chaos Emerald energy stabilizing Chaos energy neutralizing Chaos Emerald power under certain conditions Knuckles serves as its guardian. Angel Island Angel Island floats because of the Master Emerald. For thousands of years it has been protected by the echidna tribe and now by Knuckles alone. It contains: ancient ruins Hidden Palace the Master Emerald shrine countless relics Chaos Energy Chaos energy is one of the fundamental forces in the Sonic universe. It powers: Chaos Emeralds Super Forms teleportation Chaos Control ancient technology much of Eggman's advanced research Characters like Shadow use Chaos energy as part of their normal combat abilities. Super Forms Many people know stories about Super Sonic. Only a handful of individuals have actually witnessed it. A Super transformation generally requires: the seven Chaos Emeralds exceptional compatibility with Chaos energy Known users include Sonic, Shadow, Silver, and others under specific circumstances. Eggman Dr. Eggman is recognized worldwide. He has attempted world conquest countless times. His empire includes: Badnik armies factories Eggman bases enormous robots air fleets orbital weapons Despite repeated defeats, he continually rebuilds. G.U.N. The Guardian Units of Nations (G.U.N.) are the world's primary military organization. They: fight global threats investigate disasters maintain advanced technology formerly carried out Project Shadow Most civilians know G.U.N. exists. Few know its darker history. Sonic Sonic is recognized worldwide as the hero who repeatedly saves the planet. He has defeated: Eggman Perfect Chaos Dark Gaia Solaris Time Eater The End and many other global threats Most civilians don't know every detail, but they know Sonic has saved the world numerous times. Tails Tails is widely recognized as Sonic's closest companion. He's considered one of the world's greatest inventors. His machines rival or surpass many of Eggman's inventions in specific fields. Knuckles Knuckles is known primarily as the guardian of Angel Island. Most people don't know much beyond that. Amy is recognized as one of Sonic's closest allies and an active hero. She frequently assists civilians and relief efforts. The Restoration (IDW) Following the events of Sonic Forces, the Restoration was established to rebuild communities devastated during Eggman's global occupation. It is a large humanitarian organization involved in reconstruction, disaster relief, and defense when necessary. Ancient Civilizations Many ruins scattered across the world predate modern civilization. These include remnants of: the ancient echidnas the Babylonians and, as revealed in Sonic Frontiers, the Ancients Most people know these are ancient ruins, but historians and researchers study them in greater depth. The Ancients The Ancients were an extraterrestrial civilization that arrived on the planet long before recorded history. They brought the Chaos Emeralds with them after fleeing a cosmic threat known as The End. They built: Cyberspace advanced technology the Titans Eventually, their civilization collapsed, and some survivors evolved into the Chao over immense spans of time, according to the revelations in Sonic Frontiers. What an average citizen likely knows An ordinary person living in the modern Sonic world would probably know that: Sonic is the world's greatest hero. Dr. Eggman is the world's most notorious villain. The Chaos Emeralds are legendary sources of immense power. Angel Island exists. G.U.N. is the global military organization. Eggman has threatened the world many times. The Restoration helps rebuild communities after disasters. Super Sonic has appeared during major global crises, though many would only know of him through reports or eyewitness accounts.