From Sonic Retro
Sonic Unleashed, called Sonic World Adventure (ソニック ワールドアドベンチャー) in Japan, is a video game in the Sonic the Hedgehog series. The name was trademarked by Sega on March 12, 2008. Screenshots of cutscenes and gameplay were posted on March 22, 2008 along with a video shortly after. The same site that first posted the screenshots later indicated that Sega had confirmed them as official material. Gameplay is similar to the Sonic Rush series, while occasionally changing to a more Sonic Adventure experience in levels. It has been released for the Xbox 360, Nintendo Wii, PlayStation 2, and PlayStation 3. Known as Sonic World Adventure in Japan, it was originally intended to be the third installment of the Sonic Adventure series, but the development team began to introduce enough new innovations to separate it from the Sonic Adventure titles, and so the idea was dropped. This was the last Sonic the Hedgehog game released for the Sony PlayStation 2 in America and Europe (The last Sonic the Hedgehog game released in Japan for the PlayStation 2 was Sonic Riders).
The story starts as Eggman's battle fleet is in orbit around Earth, and Sonic goes to stop him. Using one of his robots, Eggman is eventually able to capture Sonic, only to have the robot destroyed as Sonic turns super. With his creation destroyed, Eggman flees with Super Sonic pursuing. Eggman lures Super Sonic into a chamber which rips the Chaos Emeralds from him and harnesses their power to break the world apart. This causes a beast to awaken from the center of the planet. Eggman's machine, however, caused some unintended side effects: The chaos emeralds are changed somehow, and they turn Sonic into a Werehog. Sonic then falls toward the broken planet, and meets a small creature who has lost his memory. Feeling remorse that he may have caused the creature's amnesia, Sonic decides that he must find someone who knows his new friend, and put the planet back together with the help of Tails, Amy, and Professor Pickle. In order to fix the planet, Sonic must find shrines (known as the Temple Of Gaia) to reawaken the Chaos Emerald's positive energy and with their power, they will restore a piece of the planet back to surface.
While restoring the sixth continent in Adabat, Chip regains his memory and reveals that he is actually Light Gaia, the opposite of Dark Gaia. The Gaias go through of cycle of the Dark breaking the planet and the Light restoring it . However, due to being released prematurely, Chip lost his memory and Dark Gaia was broken apart. Afterwards, Sonic and Chip reach EggmanLand with the help of Tails' Tornado 1 and get to the final temple. However, they are interrupted by Eggman and battle his Egg Dragoon. After defeating it though, a now nearly complete Dark Gaia rises from the Earth. Eggman orders Dark Gaia to destroy Sonic and Chip, but this backfires with Dark Gaia blowing him away. Dark Gaia then absorbs Sonic's Werehog powers, curing him of it. With no other choice, Chip calls all Gaia Temples and merges all of them together with him, creating the Gaia Collosus. The Gaia Collosus then begins to battle Dark Gaia and distracts him, giving Sonic a chance to attack. Sonic and Chip seem to have defeated Dark Gaia but Dark Gaia then transforms, engulfing the planet in darkness. Dark Gaia has became Perfect Dark Gaia.
After Dark Gaia's transformation, the newly revived Chaos Emeralds then transform Sonic into Super Sonic and the final fight begins. In the 360 & PS3 version, you must get to Perfect Dark Gaia's shield and destroy it by defeating the Dark Gaia monsters that create it as Super Sonic and the rings fill in your Health Bar. Then, you battle Perfect Dark Gaia through QTEs. In the Wii & PS2 version, you must defeat Dark Gaia by collecting rings in order to do the Super Sonic Boost to attack Dark Gaia's eyes while dodging meteors at the same time. Super Sonic and Gaia Collosus defeat Perfect Dark Gaia and light is restored to the planet. Super Sonic, now having used up all his energy, loses consciousness and the time comes for the two Gaias to go back inside the planet. Chip's final move is saving Sonic by warping him to the planet. Sonic crashes and wakes up, finding Chip, but it turns out to be an illusion. Chip necklace, though, turns out to not be and Sonic puts it on as a bracelet, hearing Chip's saying that he'll never forget him and reminds Sonic that he is now part of the planet again. The game ends with Sonic speeding off with Tails flying behind him via the Tornado 1.
The playable characters are Sonic and his new werehog form. Tails is also playable, although in mini-games rather than actual 'Sonic' gameplay. Chip is also playable as the Gaia Colossus in the final boss stage.
Sonic travels over various levels, each of which takes place on a different continent. Unleashed contains two different styles of gameplay, noted by the separation of day and night, and of Sonic and his werehog form.
In daytime gameplay, Sonic must race through various stages while dodging obstacles and destroying enemy robots, all while trying to get through the level in the most aesthetically pleasing way possible. Some levels contain branching pathways and semi-hidden areas where you can collect bonuses such as extra lives. As such, daytime levels have some light platforming. The 2d sections of the level design are reminiscent of the side-scrolling Sonic games. Sonic retains most of the moves he has in previous games, such as the wall jump, and homing attack. In addition he also has new moves: the Quick Step allows for Sonic to quickly dodge left or right, Speed Drift allows Sonic to turn around corners at high speed without slowing down, the Sonic Boost will increase Sonics speed and allow him to smash through objects and access different level paths. The PS3 and Xbox 360 version has a on-screen "Ring Energy" meter which displays how much boost is left, which can be increased by collecting rings. The PS2 and Wii versions of the game represent the "Ring Energy" amount with bars and is increased by performing "Action Chains" (attacking a string of enemies), or by collecting rings.
In nighttime gameplay, Sonic transforms into a werehog where he moves substantially slower, but is much stronger. Additionally, his arms have the ability to stretch; useful in both attacking and in grabbing onto ledges, poles, and various other level elements. Thus, platforming gameplay is heavily emphasized. Another special move, called "Unleashed", increases the strength of his attacks for a limited amount of time.
In most cases nighttime levels normally take longer to play than daytime levels, while daytime levels tend to be physically longer since Sonic is moving at a greater speed. Throughout the game, the player can collect Sun and Moon Medals which allow further level progression.
In addition to the two gameplay types explorable "hub-worlds" are also available. These Hub-worlds are a bit different depending on the version played. The PS3 and Xbox 360 versions are 3D and fully explorable and contain townspeople to converse with. Side quests can be undertaken to gain experience or unlock items such as artwork, videos, and music tracks. Sun and Moon medals can also be found in these versions. These versions also have a hotdog stand, and somewhat amusingly the manuals allude to the fact that Sonic loves chilli dogs. This was mentioned in the American cartoons but was never mentioned in the games until this point. The PlayStation 2 and Wii versions feature a menu-based map system which players simply make menu selections to talk to townspeople and find information.
Several Stages in the Xbox 360 and Playstation 3 version of the game have a downloadable "Adventure Pack" which gives the game some replay value. These include Empire City & Adabat, Apotos & Shamar, Mazuri, Holoska, Spagonia, and Chun-nan.
The Xbox 360 and PlayStation 3 versions have both voice language tracks included in the game disc and feature an option that allows to switch between both English and Japanese voice language, which is present in all the regional variations of both versions. While the game is entirely multi-lingual in all regional versions of the game, the text language is automatically defaulted by the console language settings.
The Wii and PlayStation 2 versions feature only one voice track in the game disc and according to the regional version, due to size constraints. The Western versions have the English voice language whereas the Japanese version has the Japanese one, while the text language is entirely multi-lingual in all regional versions. Since the PlayStation 2 version was never released in Japan, this version lacks the Japanese voice language completely. The text language is entirely multi-lingual and manually selectionable in all the regional variations of both versions, although the Japanese text language is not manually selectable in the PlayStation 2 version and can only be accessed if the console language settings are in Japanese.
For a complete list of the games production credits please click the following link: Sonic Unleashed credits.
PlayStation 2 version
PlayStation 3 version
Xbox 360 version
AOKI studio concepts