Adventure Field

Adventure Fields are the hubworlds of Sonic Adventure and Sonic the Hedgehog (2006). These are not traditional Sonic levels, containing neither linear path(s) nor a concrete objective, but rather they connect the traditional levels (Action Stages) to each other and the Chao Gardens, as well as being the setting for various sidequests and boss fights. In this way these titles incorporated RPG elements on top of the standard fare of high-speed platforming.

There are three seperate Adventure Fields in Sonic Adventure, namely:

• Station Square, a bustling human city - leads to Emerald Coast, Casinopolis, Twinkle Park and Speed Highway
• Mystic Ruins, ancient temples in the jungle - leads to Windy Valley, Ice Cap, Sky Chase Acts 1 and 2, Red Mountain, Lost World, Final Egg, and Sand Hill.
• Egg Carrier, Eggman's vast flying fortress - leads to Sky Deck and Hot Shelter

There are also three Adventure Fields in Sonic 06, named Town Stages:

• Castle Town, the main overworld of the game - leads to Wave Ocean and Dusty Desert
• Soleanna Forest, a vast expansive forest - leads to Kingdom Valley and Tropical Jungle
• New City, a new upcoming industrial area - leads to White Acropolis and Radical Train

Transit between these hubworlds, and accessing different locations within them, become easier as the game progress, with power-ups and plot events opening up more areas.

Instead of Adventure Fields, Sonic Unleashed took a more streamlined approach, and gave every level its own hubworld, where the same events could take place as they did in the Adventure Fields, but these events could now be specific to the level the hubworld is with. Games from Sonic Colours onward eliminated the hubs altogether, opting for level maps instead.

Adventure Fields would return in Sonic Frontiers, which evolved the Adventure Fields into a new type of Overworld, dubbed the Open Zone. These Overworlds connect the CyberSpace levels like Adventure Fields, but unlike them are not just secondary empty areas in the game. They are much larger and have many more platforming challenges and boss fights than previous games. The Chaos Emeralds are spread out across the Open Zones instead of being in Special Zones, requiring the player to attain keys from the Cyberspace levels to unlock them to progress the story.

Sonic Adventure

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  Station Square

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  Mystic Ruins

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  Egg Carrier

Sonic 06

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  Castle Town

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  Soleanna Forest

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  New City