. ve 2. Sezonlar Her şey Dr. Eggman‘e karşı Tavşan Cream‘i ve Cheese the Chao‘yu kurtarmak için yapılan rutin ssaldırılardan biri gibi görünse de Sonic ve arkadaşları kendilerini başka bir yere ışınlayan esrarengiz bir patlamanın içinde kaybolurlar. Arkadaşlarından ayrı düşen Sonic, kendisini havuzda boğulmak üzereyken kurtaran Chris Thorndyke isimli bir oğlanın yanında bulur. Chris, çok lüks bir mansiyonda, ünlü ebevenleri ve büyükbabası Chuck’la birlikte yaşamaktadır. Chris, Sonic’e arkadaşlarını bulmasında yardım ederken, Dr. Eggman’in de kendisini belli etmesi pek uzun sürmez.Sonic ve Eggman Kaos Zümrütleri‘ni toplamak konusunda yarışırken, Chris’te kendisine vakit ayıramayan anne ve babasıyla ilgili sorunlarını halletmeye çalışmaktadır. Daha sonra Chuck’ın Sonic’i kendi boyutuna geri gönderecek bir makine üretmesi üzerine Chris, anne ve babası için duyduğu üzüntünün daha da artmaması için Sonic’i kaçırır; fakat Sonic’in yardımıyla Chris ikna edilir ve Sonic kendi boyutuna döner. Chris, kendini birgün yine Sonic’i göreceğine inandırır.

3. Sezon

Sonic’in kendi boyutuna dönmesi üzerinden 6 yıl geçmiştir. Chris neredeyse yetişkin birisi olmuştur ve Helen’la bir ilişkisi var gibi durmaktadır.Büyükbabasının boyut portalının tamiriyle uğraşmaktadır. Sonic’in bulunduğu gezegene ise Cosmo adında bir kız gelmiştir ve yedi Kaos Zümrütü’nün gücünü kullanabilen efsanevi birini aramaktadır. Bu arada Sonic, uzayda Dark Oak isimli bir karaktere nerdeyse yenilmektedir. Sonic, Kara Oak Kaos Zümrütleri’ni ele geçiremesin diye zümrütleri galaksinin her tarafına dağıtır. Chris ise, tam portalı kullandığı anda kendini Sonic’in gezegeninde, onunla ilk tanıştığı zamanki yaşında bulur.
Chris, Sonic’in Dünya’dan ayrıldığı zamandan beri, Sonic’in boyutunda sadece altı ay geçtiğini öğrenir. Bu süre içerisinde, Kara Oak ve Metarex ordusu gezegene saldırmış ve Egg Gezegeni‘ni çalmıştır. Egg Gezegeni olmadan, gezegen ve üzerindeki tüm bitkiler ölecektir. Sonic ve arkadaşları, Kara Oak’ı durdurmaya karar verirler ve Kaos Zümrütleri’ni bulabilmek için uzayda yola koyulurlar.
Eggman’la yaşadıkları birçok mücadele sırasında Sonic ve arkadaşları, Cosmo’nun aslında Metarex’in bir ajanı olduğunu öğrenir. Metarex’in yaşamak için Plant Egg’in gücüne ihtiyaçları vardır. Metarex, tüm evreni yok edebilecek planlanını harekete geçireceği zaman, Cosmo’nun herkesi kurtarabilmek için kendisini feda etmesi gerekir. Bu durum, Cosmo’ya maceranın başından beri aşık olan Tails’ı üzer; fakat onu Tails’in yok etmesi gerekmektedir. Böylece, Cosmo’nun güçleri serbest kalacak ve Kara Oak’ı eski formuna geri döndürebilecektir. Cosmo’nun özü, daha sonra Tails’in toprağa işleyeceği bir tohum haline gelecektir.
Metarex’in yok oluşuyla birlikte, Eggman, yeni icadıyla Chris Dünya’ya geri yollamayı önerir. Chris,her ne kadar arkadaşlarını geride bırakacak olsa da, bu teklifi kabul eder. Portaldaki yolculuğuna başlayacağı sırada Chris, Sonic’i arkasından koşarken görür ve ağlamaya başlar. O anda Portal yok olur ve Chris Dünya’ya geri döner. Eggman ve Sonic arasındaki rekabet tekrar ortaya çıkar; ama eskisi kadar ciddi değildir, artık sadece heyecanlı olduğu için yaşamaktadır.

4. Sezon

Dördüncü bir sezonun yapımı hakkında söylentiler dolaşmaktadır. Mesela, SonicHQ’ya göre, TMS Entertainment, dördüncü sezonu hazırlamaktadır. (Belki de 3. Sezon henüz Japonya’da yayınlanmadığı için 4. Sezon yayınlanmamaktadır.)
3. Sezon’un son bölümü, 78. Bölümdeki bazı yanıtlanmamış sorular da, Dördüncü bir sezonun yazılacağı hakkında fikirler vermektedir. Mesela,Chris’e, Dünya’ya döndükten sonra ne olduğunun ve Shadow‘a ne olduğunun açıklanmaması gibi…

A version of the game, which was entitled Sonic the Hedgehog Genesis, was released for the Game Boy Advance in November 2006 as part of the celebrations of the original game’s 15th anniversary. The game is a remake of the original game as opposed to a port. It includes a new save feature and a special “Anniversary Mode” featuring the Spin-Dash move that was added in later games. In addition, the view is slightly zoomed in and adapted for the GBA’s widescreen aspect ratio,and the level select and debug codes have been left out, the former due to the fact that there is already a zone select screen.[5] The reception was negative, as many reviewers criticized the game for its slow frame rate, music, and glitches — most called the game “unplayable.” Consumers have argued that while Sonic the Hedgehog Genesis was guilty of some glitches and slowdowns, there were not enough of them to earn the game an “unplayable” label. Sonic The Hedgehog Genesis is also widely considered by many Sonic fans to be one of the worst Sonic games ever, thanks to horrible lag, glitches, unfaihtful graphics and sound and poor production value.

There was also a version of Sonic the Hedgehog that was released for the Sega Master System and the Game Gear, which loosely followed the design of the 16-bit version, although with new stages, some different zones and a level map. Noticeable differences were that the Chaos Emeralds had to be found within certain stages, instead of in the Special Stages(these only allowed the player to get rings and therefore more lives). Bonuses are awarded from the end panel, given some conditions, and there are no rings or badniks to be found in any boss levels (with the exception of the last level, Scrap Brain Zone which actually has no boss). The Sega Master System version was the final title for the console released in the U.S.

The Game Gear version has a lower screen resolution, but a larger color palette, and different controls (i.e. Sonic can accelerate and decelerate more easily, and can jump higher). Some gameplay changes were also made from the Master System version, such as warning signs added
near pits such in Green Hill Zone, because of the narrow screen and high speed; different level design on Labyrinth Zone, including location of the Chaos Emerald; falling in Jungle Zone Act 2 doesn’t lead to a bottomless pit and loss of a life; and some bosses are different.

The game also takes full advantage of the on-board Zilog Z80 and Yamaha synthesizer sound chip, and is filled with sound effects, chimes, bops and beats following the player through the levels. Many sounds play on top of one another and most of the game’s sounds were unique and of higher quality than earlier 8-bit sounds.

Besides detailed sound and animation, Sonic the Hedgehog is especially known for its dynamic music, composed by Masato Nakamura, a member of the popular J-Pop band, Dreams Come True. Using 8-bit stereo sound, the music is rich and varied throughout each level. Particularly notable are the game’s recognizable main theme and the music to Green Hill Zone. Sonic the Hedgehog’s soundtrack is still highly popular in remixing communities on the Internet, such as OverClocked ReMix. Similarities to the Green Hill Zone theme can be found in “Dreams of an Absolution”, the theme for Silver the Hedgehog in the 2006 Sonic game, also called Sonic the Hedgehog, though the song’s composer Lee Brotherton claims that this was an unintentional coincidence

If the player has at least 50 rings at the end of an act, a giant golden ring will float above the finishing sign which can be jumped through to enter one of the special stages. (This excludes the final act of a stage, when Sonic will enter a boss fight). At the end of each act, the total number of rings the player has is multiplied by 100 and added to the player’s score. During the score-tallying, the player can also jump through the air to find hidden emblems which can range from 100 to 10,000 points. This was the only console Sonic game until Sonic Adventure where the player could get more lives by collecting over 200 rings (acquiring 300 rings in the later 16-bit titles resulted in no additional lives).

Also scattered throughout each level are monitors which, when broken by the character, reward the player with one of a variety of bonuses. These include a shield which will protect Sonic from a single hit, a 10-ring bonus, an extra life, temporary invincibility (accompanied with a temporary change in music), and “Super Sneakers”, which give the player a temporary speed boost (and increase the tempo of the music for the duration). The item monitors have become another long-lasting feature in the series, though they have been changed to bubble-like containers in later games.

Despite the various types of protection available, neither the shield, rings, or invincibility will prevent the player losing a life if Sonic is crushed (by a trap or between a wall and a moving platform), drowning, running out of time (each act has a ten-minute time limit), or falling into a bottomless pit.

Progression through the game is made easier for the player by lamp posts that act as checkpoints. When Sonic passes a lamp post, its color changes from blue to red, and the next time a life is lost, gameplay will restart at that point rather than at the beginning of the act. If a checkpoint is activated and a life is lost as a result of running out of time, the time at the checkpoint will reset to 0:00.

Hazards the player experiences include a wide variety of “badniks” - these appear as animals trapped inside mechanical bodies which are released the moment the player hits them. Each badnik takes one hit to destroy, but they vary greatly from Zone to Zone; some will walk in a set path, others will try blasting the player, and some cannot be avoided at all. The player must also avoid rows of sharp spikes, cliffs, and elaborate death traps. There is also the threat of drowning, as the player can only survive 30 seconds underwater (locating air bubbles can extend this).

The game features no game saves or passwords. This means that the game has to be restarted from the beginning when the player runs out of continues or turns off the system unless the player uses a cheat code to access the level select screen. This is Sonic’s first-and last-solo adventure on a console game until Sonic and the Secret Rings in 2007.

The gameplay centers around elements that exploit the increased performance of the 16-bit console over its 8-bit forebears. It is notable for being both simplistic and engaging for players.

At the time of its release, Sonic the Hedgehog was one of the fastest platformers that had yet been released. Sonic could run, jump and roll at significantly higher speeds than most platformers of the time. Unlike other platformers, the game’s levels were designed to encourage the player to progress quickly. Springs, slopes, high falls and loop-de-loops were all available to both boost and challenge the player to reach high speeds. This was all accomplished without any slowdown in framerates, adding to the experience.