Editing Sonic the Hedgehog (1991) (section)

==Plot==
[[File:Sonic1.png|thumb|left|225px|The title screen of ''Sonic the Hedgehog''.|alt=The game's title screen, set in the first stage, Green Hill Zone. At the center is a blue and yellow emblem adorned with stars, white wings on the sides, and the game's name. Sonic is seen in the emblem, looking at the player with a confident expression and wiggling his left index finger.]]
The story is set on [[South Island]], known for housing the [[Chaos Emerald]]s, six powerful gemstones that can bring energy to living beings and power weapons of mass destruction. However, nobody knows how to obtain these gems, as South Island is a moving island, with the Emeralds existing within its natural distortions.<ref name="JPManual1">{{Cite manual |fullgame=Sonic the Hedgehog |link=Sonic the Hedgehog (1991)/Manuals#Japanese |system=Sega Mega Drive |language=Japanese |pages=11-12}}</ref>

[[Doctor Eggman|Dr. Eggman]] learns of the Chaos Emeralds' existence and raids South Island to obtain them, capturing the local [[Animals]] to power his [[Badnik]] robots and building the [[Scrap Brain Zone|Scrap Brain]] as his base of operations. His nemesis, [[Sonic the Hedgehog]], immediately rushes to the island to stop him.<ref name="JPManual1" /> He travels through the various [[Zone]]s, freeing the Animals and defeating Eggman on numerous occasions while hunting for the Chaos Emeralds.

[[File:FinalZoneBossEggman.png|thumb|225px|left|[[Sonic the Hedgehog|Sonic]]'s final battle against [[Doctor&nbsp;Eggman|Dr. Eggman]].|alt=Screenshot of the game's final stage, fittingly named "Final Zone". Sonic fights against the boss, the Egg Crusher, which is piloted by Eggman.]]
Sonic eventually infiltrates the Scrap Brain. After a few setbacks, he engages in a final fight against Eggman in a room armed with the [[Egg Crusher]]. After defeating the doctor, Sonic returns to [[Green Hill]], where he celebrates his victory with the Animals.<ref name="JamGuide">{{Cite book |title=ソニックジャム　オフィシャルガイド |publisher=SoftBank |date=2 October 1997 |page=30 |isbn=978-4797303377 |language=Japanese}}</ref> A post-credits sequence will play depending on the player's actions:
*If the player did not manage to collect the six Chaos Emeralds, Sonic will give the player an annoyed look for not completing everything, but then proceeds to jump in the front of the camera to do a victory pose, thus ending the game. Meanwhile, Eggman will have secured the remaining Emeralds for himself;<ref name="JamGuide"/> after the credits, he will be shown laughing on a black screen juggling any of the Emeralds the player has not obtained while the text "TRY AGAIN" appears underneath him.
*If the player manages to collect all Chaos Emeralds, Sonic will release the Emeralds, which will disappear after filling the entire Zone with large, colorful flowers. Following the credits, a frustrated Eggman is shown comically jumping on the text "END".