Videos
Sonic Part 2 - Did You Know Gaming? Feat. WeeklyTubeShow
Sonic - Did You Know Gaming? Feat. WeeklyTubeShow
 
It's possible to play the game using an Atari 2600 controller, as every button besides start works as a jump button, and thus the game is fully playable despite the controller only having a single button.
Contributed by SmashMaster1001
Hirokazu Yasuhara was going to go to America to establish a new development team but because of the Gulf war between Iran and Kuwait, his trip was delayed. Yuji Naka and Naoto Oshima noticed him being upset and decided to let him join their team temporarily until he leaves. He ended up staying for a year to design the levels for major games such as Sonic the Hedgehog.
Contributed by Artwark
In an early version of Sonic The Hedgehog shown in a pilot episode for the TV game-show "Nick Arcade", a rolling ball can be found towards the start of Green Hill Zone Act 1. This was removed from the game's final release.
Contributed by ABOhiccups
Attachment
In the original international release, a short cut taken to the finish in the Labyrinth Zone would only allow the player to collect a total of 49 rings, missing 1 ring from going to the special stage. However, in the Japanese version, a ring was added so that people could get to the special stage if they went this way.
Contributed by Ophl
The Japanese version of the game has more parallax scrolling layers. An example would be that the clouds in some of the zones move across the screen, while the international version the clouds are stationary. The Labyrinth zone also has an underwater wave effect in the Japanese version. The only zones that were not changed were the Starlight zone and the Final zone.
Contributed by Ophl
Attachment
Within the game's data is a set of unused sprites showing Sonic shrinking or falling away from the screen.
Contributed by Tobu_
Attachment
In the game's code there exists a sprite of a Goggle monitor, and some matching goggles to go with it. There is also an unused sprite of Sonic holding his breath, meaning these were likely once an underwater power up.
Contributed by RadSpyro
Attachment
Scrap Brain Zone was originally known as 'Clock Ork Zone'. It's believed the name was changed because it was planned to be called 'Clock Work Zone', but no 'W' existed in the game's zone title font.
Contributed by RadSpyro
Attachment
The Japanese band "Dreams Come True" are credited with composing the game's entire soundtrack. To promote their first tour, the band had concert posters with Sonic the Hedgehog on them, and painted Sonic on the side of their tour bus.
Contributed by KidDivinegon
The game's soundtrack was composed on an Atari computer.
Contributed by KidDivinegon
In early screenshots of the Genesis game, a UFO could be spotted, but was not present in the final game. Yet when Sonic the Hedgehog was released in 2005 for mobile phones, the UFO sprite was found hidden away in the files, but still unused.
Contributed by RadSpyro
Attachment
In Marble Zone, there are dilapidated shrines and pillar structures in the backdrop with patterns on the arches that resemble Mario's face. This is likely a coincidence, as the pattern also appears to be of two lions.
Contributed by Cheshireson
Attachment
There are hidden embedded Japanese staff credits on the "Sonic Team Presents" screen. With the aid of a palette editor or cheat code, one can hide the title card and invert the colour of the background to make it visible.
Contributed by Cheshireson
According to series developer Yuji Naka, the iconic "SE-GA" jingle at the beginning of the game took up 1/8 of the game's cartridge space.
Contributed by AntCGallagher
Attachment
The iOS and Android apps were updated in March 2013 by Sonic community hackers Taxman and Stealth from the ground up, using the Retro Engine also used in the HD remake of Sonic CD (the engine is named after Sonic Retro, a prominent Sonic fansite). Besides featuring a constant 60fps, this remake has a ton of extras, such as the ability to play as Tails, Knuckles and Super Sonic, being able to collect the seventh Chaos Emerald (which allows the player to become the aforementioned Super Sonic), adding Elemental Shields from Sonic 3 & Knuckles, turning on and off the Spike Bug and the ground/air speed caps, and, last but not least, you can add prototype characters and sprites through debug mode, like Splats the Bunny (a Green Hill Zone enemy that never made it into the final game) and the UFOs in Marble Zone.
Contributed by SonicManEXE
Attachment
Sonic was going to have a human girlfriend named Madonna. This was to copy Mario's girlfriend at the time, Pauline. She was removed by the product manager, Madeline Schroeder. She wanted to remove Madonna as to "soften" Sonic for children and foreign countries, as she thought the concept was too "Japanese". The concept of a human girlfriend was later used for Sonic the Hedgehog (2006)'s Princess Elise.
Contributed by gamemaster1991
Attachment
Sonic was originally going to be called 'Mr. Needlemouse', a literal translation from the Japanese word for hedgehog.
Contributed by BomberJ
In Act 1 of Green Hill Zone, it is possible to die by going too fast. At a certain point in the stage, the camera may not be able to keep up with you when you dip downhill, causing the game to think that Sonic has fallen into a bottomless pit.
Contributed by lividd3ad
Attachment
There's footage of a proto-type build of Sonic in the background of the Noah's Arcade ad in Wayne's World. The footage shows UFOs in Marble Zone. These UFOs were removed from the final build of the game.
Contributed by DidYouKnowGaming
In issue 260 of Nintendo Power, Yuji Naka revealed that the initial concept for Sonic the Hedgehog's gameplay came from playing level 1-1 of Super Mario Bros. over and over again as fast as he could, since you always had to play the level first regardless of whether you used warp zones or not.
"I always tried to get through the level as fast as I could. And that inspired the initial concept for Sonic the Hedgehog."
Contributed by DidYouKnowGaming