Note: Please remember this isn't true information, and the pictures of Asquire Palace Zone are taken from Sonic Fan's.
Sonic the Hedgehog 4: Episode III, is a 2.5D platforming game, made by Sega and Dimps, and is a direct sequel to Sonic the Hedgehog 4: Episode II. After the 2nd downfall of Dr. Eggman's boss in the end of Episode II, Sonic and Tails finally decide to take a little vacation, but what awaits them will come sooner than expected!
One adventure has lead to many things in Sonic's world, but as he enters another one, he will find something so unexpected, it will put a toll on his life.
The return of "Mini-Bosses" make an appearence since Sonic Adventure.
At the end of Episode II, Metal Sonic was finally destroyed for good, and Eggman has been shoved into the ground. Tails gives Sonic a hand onto the Tornado, where they take off on another adventure...
Unknown to them, Eggman climbs out of the rubble of his Doom Robot, and realizes Sonic has escaped. Eggman then hatches another plan, and this time, it will go into effect immediately!
Sonic and Tails take halt in the Tornado to land on Ascquire Island, where they find Knuckles searching angrily through the tropical landscape. Knuckles reveals that Eggman has taken the Super Emeralds, and shattered them into tons of pieces! Sonic and Tails soon realize that Eggman is up to his old tricks, and want to know what he is planning. Suddenly, a giant blast is heard through the air, defying noise for the gang. They cover their ears, and witness a giant, spaceship taking off, with an Eggman-styled face printed on the side.
Knowing this must be trouble, Sonic sets off with his Buddy "Tails", as Knuckles takes another route to stop Eggman from causing disaster!
Sonic the Hedgehog: Deciding to rest after finishing off Metal Sonic, he lands on Ascquire Island with Tails, and realizes Eggman is back, and even more dangerous then ever! He must speed off on another adventure with his buddy Tails as he speeds through 6 new zones, and 7 Special Stages!
Miles "Tails" Prower: After surviving the battle of Episode II, Tails takes off with his buddy Sonic in his Tornado towards another adventure, and finds Ascquire Island! Realizing Eggman has set off on another scheme once again, Tails and Sonic must chase Eggman through 6 zones, and finally can the Egghead for real!
Knuckles the Echidna: After Sonic 3 & Knuckles, he returns to his shrine on Angel Island, resuming his duty as Guardian of the Master Emerald. During his sleeping course, Eggman quietly uses the Master Emerald to bring out the Super Emeralds, and shatter each and every one of them! Knuckles soon gives chase to Eggman, ending on Ascquire Island, where Knuckles hunts for the Super Emeralds. Realizing Eggman is near completion of his scheme, Knuckles much return to the series and defeat Eggman!
Dr. Eggman: After his fall in Episode II, he returns to break the Super Emeralds and create his new invention, The Death E.G.G! Setting off into the sky, he thinks NOTHING can stop him now! But he may have to guess again, as Sonic and Tails are already on their way to stop Eggman, and hunt him down ONCE AND FOR ALL!
Mecha Sonic: After The Events Of Sonic 3 & Knuckles, this robot is not fooling around anymore! Get ready to RUMBLE!
Metal Sonic: Don't worry about him, you only fight him in Metal Junkyard Zone!
Ascquire Palace Zone - A run down, forest-themed palace, which is ruled by Eggman.
Neon City Zone - A colored casino, where badinks roam the brightened jackpots.
Black Manor Zone - A creepy castle, where Eggman keeps his 2nd headquarters.
Planet Mobius Zone - Sonic's home planet, where Eggman has finally taken over.
Metal Junkyard Zone - A metal yard where Eggman's previous robots are scrap metal!
EGG HQ Zone - Eggman's HQ, where he builds all his badniks.
Sprites have been recycled from Episode II using Sonic and Tails', and Knuckles' sprites are brand new, extracted from files of Sonic's. 2.5D side-scrolling gameplay is used in Episode III, just as others were.
Sonic and Tails' storyline takes place on Ascquire Island, where shards of the Super Emeralds are found strewn across the Island. They take easy finding routes, where the barriers and badinks are one less step to think about. Their levels are set on an "Easy" difficulty, making it more simple for beginners.
Knuckle's story also starts off on Ascquire Island, but his gameplay is set on an "Advanced" difficulty, for intermediate players. As in Sonic 3 & Knuckles, he takes different routes, and breaks through barriers Sonic nor Tails can enter. Knuckles' bosses are considered harder and more difficult to defeat.
Ascquire Palace - Egg Zapper
Neon Ocean - Egg Bobber
Black Manor - Haunted Egg
Planet Mobius - Planet Egg
Metal Junkyard Zone - Magnet Metal Sonic
EGG HQ - Egg Phoenix BETA