Sonic the Hedgehog (1991)


 * Not what you were looking for? See Sonic the Hedgehog (disambiguation).

Sonic the Hedgehog (ソニック・ザ・ヘッジホッグ) for the Sega Mega Drive is the first title in the Sonic the Hedgehog series, and the third appearance of Sonic the Hedgehog. The game's original programmer was current Sonic Team leader and series creator Yuji Naka, and the planner was Hirokazu Yasuhara. The gameplay was faster than any other game before it and amazed many people at launch. This was due to the Mega Drive's Motorola 68000 processor, whose basic speed and ability to handle 16-bit numbers gave it incredible speed compared to its predecessor, the Master System.

Gameplay
Sonic the Hedgehog plays very similarly to other platformers, in which the titular character must get to the end of the stage in the allotted time, while collecting the items along the way. Essential to the gameplay are the golden rings the player collects along his/her way in each level, a feature which would become one of the defining characteristics of the series. These items are regularly placed around the level map and serve multiple functions. First, the player collects rings to protect Sonic. As long as they have at least one ring, the player will not lose a life when injured. Instead, when hit, up to 20 of the rings the player has collected will fly outward and scatter around the immediate area for some seconds, some of which can then be retrieved before they disappear. If the player runs into an enemy without a single ring, they will lose a life. If the player collects 100 rings they will gain a life, and gain an additional life for every 100 rings after that, provided the rings are not lost.

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 where the player could not get more lives by collecting over 200 rings (this is the only 16-bit title where it is impossible to obtain 300 rings in a single stage).

Also scattered throughout each level are monitors (or TVs as some call them) 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 that can float in later games.

Despite the various types of protection available, neither the shield, rings, nor invincibility will prevent the player losing a life if Sonic is crushed (by a trap or between a wall and a moving platform), drowned, runs out of time (each act has a ten-minute time limit), or falls 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, the spherical top spins around and 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. In the Japanese version, 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 (in Labyrinth Zone and the third act of Scrap Brain Zone which acts contained water), as the player can only survive approximately 30 seconds underwater (locating air bubbles can extend this).

Zones
Sonic the Hedgehog had seven zones (plus the Special stages). The US manual states that there are in fact six zones, possibly because the Final Zone was taken to be the boss of the Scrap Brain Zone and not a zone in itself.
 * Green Hill Zone
 * Marble Zone
 * Spring Yard Zone
 * Labyrinth Zone
 * Star Light Zone
 * Scrap Brain Zone
 * Final Zone

Special Stages
If Sonic finishes the first or second act of any of the first five zones with at least 50 rings, a large, spinning ring will appear. If he jumps into it, he will enter a "Special Stage" that hides a Chaos Emerald. In these stages, Sonic, in ball form, falls through a series of rotating mazes.

If he can avoid the "GOAL" signs along parts of the stage's walls (presumably labelled "GOAL" to entice the player into a failed attempt at getting a Chaos Emerald), he will eventually find the Chaos Emerald encased in colored diamonds; touching the diamonds repeatedly will cause them to change color from blue, to green, to yellow, to pink and ultimately disappear, allowing access to the Emerald. The stage will end when Sonic either touches the Emerald or hits a "GOAL" sign. If 50 rings are collected before Sonic makes contact with a "GOAL" sign or gets the Chaos Emerald, then a 'Continue' will be awarded to the player, indicated by a brief, distinct change in melody. Many fans believe that Super Sonic does not appear in Sonic the Hedgehog because 7 Chaos Emeralds are required to transform, whereas this game has only 6.

There are a total of ten opportunities to get Chaos Emeralds, meaning the player can fail a Special Stage up to four times if all six Emeralds are to be collected before the end of the game. Scrap Brain Zone Act 1 will not have a large ring at the end of it, even when finishing with 50 rings, despite the act ending like any of the Act 1s before it. If the player fails a stage, that stage is skipped and is returned to after attempting the sixth and final Special Stage.

An oddity with the Special Stages is that it is stated in the US manual that 1up items can be found in Special Stages, but they are not seen anywhere. It is possible, however, to earn extra lives by collecting 100 rings in a single stage, indicated by the same sound used in the main zones.

Bosses
At the end of the third Act of each Zone (except the Scrap Brain Zone), Sonic faces off against Eggman, who is piloting one of his Egg Mobiles. For each battle, Robotnik's machine has a different design. Sonic must hit each boss 8 times to destroy it.


 * 1) Wrecking ball (Green Hill Zone)
 * 2) Fireball shooter (Marble Zone)
 * 3) Spike weapon (Spring Yard Zone)
 * 4) Retreat (Labyrinth Zone)
 * 5) Mine dropper (Star Light Zone)
 * 6) Final Zone

Master System and Game Gear
As the Master System still had high sales in South America (and in limited amounts in the US through retail stores), a version of Sonic the Hedgehog was produced for the Sega Master System. This version had slightly different levels and bosses, and simpler gameplay. The Master System version was released for the Wii Virtual Console on August 4, 2008. This version was also made available for the Game Gear, with warning signs added to the game due to the smaller screen.

United States
The EU/US manual contained the following story prologue:


 * Dr. Ivo Robotnik, the mad scientist, is snatching innocent animals and turning them into robots! Only one tough dude can put an end to the Doc's evil scheme. It's Sonic, the real cool hedgehog with the spiked haircut and power sneakers that give him super speed. Help Sonic go down platforms and slides. Go into space and do the loop-de-loop until you're dizzy. Free all the animals and become the super hero. Be Sonic! Be atomic!

Japanese
A translation of the story prologue from the Japanese manual reads:

"Sonic…that annoying, impertinent hedgehog. Thanks to him, my great plans are always laid to waste! Oh, but this time, I'm going to rub him out with the power of science! Ha ha ha ha ha…"
 * ''The evil mad scientist Dr. Eggman is up to his old nasty tricks again.

South Island is a treasure trove of gems and ancient ruins. They say that it's the island where the mystical Chaos Emeralds lie. The Chaos Emeralds are a super-material that give energy to all living beings. Also, when applied to scientific purposes, they can be used for nuclear and laser based weaponry. However, nobody knows exactly how to get ahold of these emeralds. At the same time, though, they do say that the reason why South Island is always moving is because the emeralds are somewhere inside the island's hazy depths.

One day, crisis visited upon the island. And who showed up with it but Dr. Eggman and his cronies. "I'll find those emeralds even if I have to dig up the entire island to do it!"

Dr. Eggman set up a fort in one corner of the island, and went about carrying out his plan.

"Eggman, you still haven't had enough?" Sonic hurried as soon as he heard the news. Dr. Eggman never seemed to leave him alone, even though Sonic had beaten him every time so far. It sounded like Dr. Eggman considered Sonic his sworn enemy, but he was never any match for Sonic.

However, this time something is amiss.

"Have you seen it, Sonic? This time is going to be different! Because this time, I've turned all the animals on the island into robots!"

"E...Everybody!?"

"All of them go about in accordance to my orders. In other words, Sonic, everyone on the island is your enemy! Gya— Ha ha ha ha ha ha ^cough^ ^ack^ ^ahem^. This time, the world really will be all mine!"

This is terrible! Hurry! Sonic the Hedgehog - everyone is waiting for your help!''

Videos
thumb|300px|right|Sonic US commercialthumb|left|300px|Europe commercial

Cheat codes

 * Level select - At the main menu, press UP, DOWN, LEFT, RIGHT, then hold A and press start.
 * Debug mode - At the main menu, press UP, C, DOWN, C, LEFT, C, RIGHT, C, start, then hold A until the game starts.

Note : These codes do not work on the Xbox Live Arcade and Playstation Network versions of the game.

Glitches
There are 6 particular glitches in the game that could either help, or mess things up for Sonic very badly.


 * 1) Too fast Sonic in the Green Hill Zone; Result: If going too fast down two tubes in Green Hill, the camera won't respond and Sonic will die at the ledge to the giant ring pattern.
 * 2) Rolling after Labyrinth Zone Act 2's end; Result: An illegal instruction error will proceed if this glitch is triggered, making the player reset the game.
 * 3) Too many hits on the Final Zone's boss; Result: If timed correctly, the player can hit Robotnik two times on the final hit, showing that he would need to be hit 255 more times.
 * 4) Sonic jumps too far away in Final Zone; Result: Sonic would jump off into the bottomless pit, therefore losing a life.
 * 5) Move through walls in Scrap Brain Zone; Result: On one of the moving platforms, Sonic can duck and go through the wall, showing that he has been placed in another location.
 * 6) "Spike Bug"; Result: Though this is technically intentional, Sonic's isn't invulnerable to spike damage immediately after taking a hit. This causes instant death (or an endless loop, if on debug mode). This was changed in later games and in certain ports.

Trivia

 * There are two versions of the game, one being a revision only released in Japan. This update makes some very minor changes to the game's programming, as well as adds some visual effects such as scrolling clouds in Green Hill Zone or water ripples in Labyrinth Zone. It also corrects the zone order on the level select. This version of the game is used is most subsequent releases. In addition, the scrolling clouds return in most appearances of Green Hill Zone.
 * Michael Sroka holds the high score for Sonic the Hedgehog: 404,980. He achieved this on May 28th, 2010.
 * There was a sound test that was originally supposed to be in this game but was scrapped. But one character in this sound test appeared in future games (Vector) while the others appear in the Archie Comics as part of Mina Mongoose's band.
 * The Special Stage for this game also appeared in the 1st episode of Sonic the Hedgehog 4.
 * For an unknown reason, there were only 6 Chaos Emeralds in this game, whereas in later games (With the exception of Sonic the Fighters, as that game has 8 Chaos Emeralds), there were only 7 Chaos Emeralds.
 * In the console versions of Sonic Generations, this game is playable from the hub world. It is unlockable after a Genesis controller is purchased from the Skill Shop. This version keeps track of time (similar to the Sonic Jam release). In addition, a new bonus feature can be unlocked via the Skill Shop - infinite continues. The Xbox 360 version lacks the level select code, but the PlayStation 3 version has it intact.