Green Hill Zone (グリーンヒル Gurīn Hiru?, lit. "Green Hill"), also known as simply Green Hill (グリーンヒル Gurīn Hiru?), is a location in the Sonic the Hedgehog series. A natural paradise of a Zone, Green Hill Zone was the first location Sonic the Hedgehog passed through during his mission to free South Island from the tyranny of Dr. Eggman. Since then, the Zone has returned in many shapes and forms, although always as part of Sonic and his allies' journey to foil threats to the world.
Green Hill Zone is known for being one of the most famous and iconic video game levels of all time, and was the first Sonic experience for many people.
Green Hill Zone is a giant field blessed with greenery and beautiful blue lakes. Topographically, it varies from having a plateau-like terrain, with short mountains; to being a mountaineous area with massive mountains, slopping cliffs, giant peaks, and tight paths high up in the sky supported by natural pillars. Either way, the location is filled with large waterfall vistas, palm trees, and tropical flora of various types. Perhaps most distinctively, the soil is checkered brown, and most of the local plant life appears to have unfamiliar geometric appearances to it. As shown during the Sky Base Zone incident and the Time Eater incident, Green Hill Zone also has a series of dark, brown caves underneath it, which have small lakes and ponds of water in them. There are artificial structures made of wood as well, such as bridges, fences, totem poles, and scaffolding-like buildings.
Perhaps what makes Green Hill Zone unique is its "crazy" terrain. Though it has been noted that it has gently-slopping hills, the whole area is filled to the brim with impressive set pieces such as loops, corkscrews, floating platforms, tunnels, among others; which can be attributed to the "twisty, bouncy beauty of nature".
During the War to Take Back the Planet, Green Hill Zone had a different appearance. While still a picturesque landscape for the most part, the region was partially turned into a desert, with its flora and soil adopting a yellowish color while the waters in the lakes and waterfalls had been replaced with sand.
Sonic the Hedgehog (16-bit)
In Sonic the Hedgehog (16-bit), as part of his plans for world domination, Dr. Ivo Robotnik invaded South Island to find the Chaos Emeralds. During his occupation, Green Hill Zone was one of the Zones on South Island that the doctor invaded, kidnapping the local Animals while filling the Zone with Badniks.
Green Hill Zone soon after became the first Zone Sonic the Hedgehog ran through during his adventure to stop Dr. Robotnik's plans. Along the way, Sonic had to overcome several traps and Badniks. Eventually, he got attacked by Robotnik in his Egg Wrecker. Sonic managed to defeat the doctor however, and was able to proceed with his journey.
At the end of his adventure, Sonic made a brief return to Green Hill Zone. There, he discovered that the Zone was now free of Badniks and thronging with celebrating Animals. Having collected all the Chaos Emeralds as well, Sonic released them from his hands, while the Emeralds started to spin; after a big flash, the Chaos Emeralds had disappeared and all the flowers of Green Hill Zone had changed their look, making the Zone even more beautiful. With everything said and done, Sonic struck his victory pose.
Sonic the Hedgehog (8-bit)
In Sonic the Hedgehog (8-bit), Green Hill Zone was one of the Zones on South Island that were invaded by Dr. Ivo Robotnik during his hunt for the Chaos Emeralds on the island. During his occupation, he captured the local Animals, put them in metal cages, and sent his Badnik army out to find the Chaos Emeralds.
Green Hill Zone was later the first Zone Sonic traveled through on his mission to end Robotnik's evil operations on South Island. There, he found one of the Chaos Emeralds. Eventually, he encountered Robotnik, although he was able to defeat the doctor and continue with his adventure. After being defeated for the final time, Robotnik fled from his Sky Base to escape through Green Hill Zone. However, Sonic followed him there through a teleporter, which transported him to just above the Egg Mobile, thus allowing him to deal Robotnik the finishing blow. Afterward, Sonic released the six Chaos Emeralds he had found, reversing the pollution on South Island caused by Robotnik.
In Sonic Blast, Green Hill Zone was represented by the green color, whereas the other local Zones were Yellow Desert Zone, Red Volcano Zone, Blue Marine Zone and Silver Castle Zone. Aside from that, Green Hill Zone also had a more rocky scenery as well.
During Sonic and Knuckles' mission to find the missing Chaos Emerald shards and stop Robotnik's latest plan, the two rivals first made their way through Green Hill Zone, making it the first of many Zones they would pass through.
Sonic Jump series
Sonic Jump (2005)
After receiving an urgent call from Tails, Sonic would make his way through Green Hill Zone on the way to Tails' Research Facility. Little did Sonic know that Green Hill Zone was but the first of many regions he had to pass through on his new adventure.
Sonic Jump (2012)
In Sonic Jump (2012), Sonic and co. would travel through Green Hill Zone in order to reach Dr. Eggman and stop his hunt for Animals. After they managed to corner Eggman however, the doctor escaped to another Zone, although not before capturing more Animals.
In the console/PC version and Nintendo 3DS version of Sonic Generations, Green Hill received a more realistic appearance. This time around, as a side-effect of the Time Eater's time-traveling, an incarnation of Green Hill from somewhere in spacetime got transported to White Space where it was drained of color and life.
After ending up in White Space, Sonic paid a visit to Green Hill when he first saw it in that realm. By speeding through Green Hill, Sonic was able to fix space, thereby restoring Green Hill and, by extension, Tails from their lifeless states. When the Time Eater later got destroyed, Green Hill was seemingly returned to its rightful place.
Sonic Runners Adventure
In Sonic Runners Adventure, Green Hill Zone possessed its green-striped grassy plains and checkered soil. It also had a bright blue sky, and a wide lake in which many blocky islands and mountains sat in. It was also filled with many palm trees, flowers, and running waterfalls.
While Tails wandered around Green Hill, Dr. Eggman caught him using his Mind Control Ray and forced him to built him a robot teleporter. Eventually though, Tails got an emergency transmission out to Sonic. Hoping to find his friend, Sonic arrived in Green Hill where he followed the eyewitness accounts of local Flickies and clues left behind by Eggman and his robots. Eventually, Sonic located a Badnik-producing facility and shut it down before rescuing Tails from Eggman's clutches. There, the fox cub brought Sonic up to speed on what he knew had happened to him. Afterward, Sonic tracked Eggman down and defeated him in battle. However, Eggman would escape through his damaged robot teleporter in the aftermath, forcing Sonic and Tails to follow him through said device.
In Sonic Forces, Green Hill Zone had been turned into a partial desert due to the heavy desertification caused by Dr. Eggman's industries. As a result, sandworms had taken up residence in the otherwise peaceful region.
While on a recon mission to Arsenal Pyramid, E-123 Omega jumped the gun and launched an attack on the base by himself. Within it, he encountered Infinite, who made short work of the robot using his new power. Shadow the Hedgehog soon after came to the facility to find Omega, only to encounter Infinite instead. After explaining his backstory to Shadow and how the black hedgehog had humiliated him a few months prior, Infinite trapped Shadow in an illusion. Although Shadow soon escaped it, Infinite was still pleased with the results. As the facility then began exploding around them, Infinite made his escape while Shadow was forced to withdraw.
A month later, while traveling through Green Hill, Sonic received an emergency call from Tails, who needed his help in the City, prompting Sonic to leave the desert-like region. Six months later, after Sonic was rescued from prison by the Avatar, the two ventured to Green Hill to destroy Eggman's base, the Arsenal Pyramid. Tails and Classic Sonic later traveled to Green Hill to find Eggman. There, they witnessed a meeting between Eggman and Infinite, and learned some vital information from them. After Eggman and Infinite parted ways however, Classic Sonic emerged to battle Eggman. Although Eggman ultimately lost to Classic Sonic, the doctor ensured the victorious duo that he would defeat the Resistance and have the world for himself in just three short days, before making his escape.
When the Resistance needed to destroy the Death Egg, the Avatar went to Green Hill where they distracted Eggman's forces so the others could attack the Death Egg. While there, the Avatar got attacked by the Death Crab, but managed to defeat it. In the aftermath, the Resistance successfully reclaimed Green Hill from the Eggman Empire. After the Resistance destroyed the Death Egg, Eggman and his lackeys retreated from their spot in Green Hill to Metropolis.
Other game appearances
In Sonic Drift, Green Hill Zone appears as a racetrack alongside other Zones from Sonic the Hedgehog. Its appearance generally remains unchanged from the original Sonic the Hedgehog. Green Hill Zone tracks from all Chaos GP cups are mostly simple and feature only few direct bends. Because of this, Green Hill Zone from red Chaos GP is the most challenging track of all three.
Sonic Adventure 2
In Sonic Adventure 2 and its enhanced port Sonic Adventure 2: Battle, Green Hill Zone returned in its first full 3D iteration and as an extra stage that can be unlocked by collecting all 180 emblems. The music is a remixed version of the original music, and when Sonic jumps or destroys an enemy, the same sound effects from the original game are played instead of the new sound effects from Sonic Adventure 2. The level's layout is similar to the original level, but shifts land instead of going straight.
In Sonic Battle, Green Hill Zone appears as a battlefield, unlocked by completing Emerl's story. The arena is wide, with many open areas and platforms. Although not officially stated to be in Green Hill Zone, Emerald Town in Sonic Battle has similar palm trees and checkerboard rock faces identical to those seen in the original Zone.
Sonic Jump series
Sonic Jump 2
In Sonic Jump 2, Green Hill Zone returned as the first Zone in the game. This iteration of Green Hill Zone seems to prominently feature a rocky mountain and the iconic loop-de-loop is absent as well. It is also given a new background music which would then be remixed in the later Sonic Jump games.
Sonic Jump Fever
In Sonic Jump Fever, Green Hill Zone is the first Zone in the game. In addition to its iconic traits, like green grass, checkered soil, mountains and waterfalls and loop-de-loop, the Zone includes small platforms that basically consist of the grass with a partial portion of the soil. Aesthetics on the platforms of the Zone include flowers, wooden fences, and a totem poles.
Sega Superstars Tennis
In Sega Superstars Tennis, Green Hill Zone was fitted with a tennis court with various characters making cameo appearances around the field, mainly the Chao from the Sonic Adventure series, also Blaze the Cat, Silver the Hedgehog, Knuckles the Echidna and Big the Cat. This is where many missions in Sonic's world in Superstar Mode take place, including a singles tournament with various Sonic characters.
Sonic Chronicles: The Dark Brotherhood
In Sonic Chronicles: The Dark Brotherhood, Green Hill Zone took on a more realistic look, adding detailed rocky textures to loops and other gimmicks, while still retaining certain features, such as checkered walls in certain areas. It was also shown to be inhabited by Wild Boars and Enraged Armadillos.
Sonic eventually arrived in Green Hill Zone after he received a call from Tails, who needed his help dealing with the Marauders. Ever the hero, Sonic began making his way through Green Hill Zone to Tails in Central City. Along the way, Sonic noticed that the local animals had become strangely belligerent and prone to attack on sight; this behavior was later discovered (by the beleaguered Dr. Madden) to have been caused by signal-generating machines hidden around the area.
While making his way through Green Hill Zone, Sonic met Amy, who joined his party and helped him get past a Marauder Scout blocking the way out of Green Hill Zone. Sonic and his team later returned to Green Hill Zone to look for the missing Knuckles, only to find the area overrun by robots. Investigating some old Eggman hideouts, the team found no trace of Knuckles. However, they did found some Communicators that led them straight to him. Sonic and co. soon after returned to Green Hill Zone again to find Dr. Eggman. Along the way, they managed to recruit Cream for their party after helping her find Cheese. Eventually, Dr. Eggman himself was discovered, operating out of an underground hideout. There, Eggman convinced Sonic and co. to let him help them in their quest to stop the Marauders.
Mario & Sonic at the Sochi 2014 Olympic Winter Games
In Mario & Sonic at the Sochi 2014 Olympic Winter Games, Green Hill Zone appears as the location for the Hole-In-One Curling Dream Event.
In Sonic Dash, in July 2016, to coincide with the series' 25th anniversary and in celebration of achieving 200 million downloads, an update added Green Hill Zone as a new level, complete with the stage's original music.
Sonic Forces: Speed Battle
In Sonic Forces: Speed Battle, Green Hill appears as one of the six main areas in the game, along with Sky Sanctuary, the City, Mystic Jungle, Golden Bay, and Planet Wisp. The tracks that take place in Green Hill are as follows:
The following Green Hill tracks are not currently available in the game:
|Parched Palms R||7
|Pyramid Valley R||7
In Sonic Racing, Green Hill Zone is one of the areas in the game. It was added in October 2021 as part of the v2.0.0 update. The tracks that take place in Green Hill Zone are Waterfall Hollow, Crabmeat Gorge and Stunning Springs.
Sonic Speed Simulator
In Sonic Speed Simulator, Green Hill Zone appears under the name Green Hill. In this game, it serves as the game's starting world. Here, the player is introduced to the gameplay and game elements of Sonic Speed Simulator. It also serves as the hub from where the player can reach the other worlds in the game. In addition, there is a mission card here that allows the player to unlock Sonic the Hedgehog as a playable character.
Appearances in non-Sonic games
Super Smash Bros. series
In Super Smash Bros. Brawl, Green Hill Zone is an unlockable stage, which is obtained by unlocking Sonic. The stage features its classic style and terrain, and familiar Green Hill objects such as palm trees, totem poles, item boxes, and spinning flowers.
It features Green Hill Zone's music along with Scrap Brain Zone's music from the original Sonic the Hedgehog, and other iconic soundtracks from other Sonic games. The background also includes moving platforms (either swinging or levitating up and down), spikes, and Rings. And just as in the original Green Hill Zone from the first game, the middle section of the land crumbles after a while of fighting on it. Luckily, it is the only section of land that does so in this level. A midway Star Post sometimes appears in the stage. When hit, it spins, damaging characters that go near it (except for the character that first hit the post).
Most iconic of this stage is the famous loop, in which Tails, Knuckles and Silver make cameo appearances by occasionally running through it. If the Pokémon Trainer is present during the match, he will be standing on top of the loop (instead of the 1-Up Monitor that is usually there).
Green Hill Zone makes a reappearance in Super Smash Bros. for Nintendo 3DS, remaining unchanged from the version in Super Smash Bros. Brawl, other than being reduced to having two soundtracks: its original theme and "Live and Learn".
Green Hill Zone also makes a return as a stage in Super Smash Bros. Ultimate.
Sega Splash Golf
In the Japanese PC game, Sega Splash Golf, there are a number of courses themed after Sega franchises. The Sonic the Hedgehog course looks very similar to Green Hill Zone, with checkered hills, green grass and floating Rings. There are also containers on the course taken from Sonic Adventure 2.
Samba de Amigo Wii
There is a Sonic-themed level of the Sonic Team game, Samba de Amigo Wii. This level takes place in Green Hill Zone where the protagonist, Amigo dances alongside Sonic the Hedgehog himself. There are also many Miis and Chao dancing on the sides.
Dengeki Bunko: Fighting Climax
In the Japanese arcade game, Dengeki Bunko: Fighting Climax, one of the stages taken from a Sega franchise, aside from Valkyria Chronicles, is Green Hill Zone. The design is taken from Sonic Generations, where there are modern Springs and Dash Panels along with some visible the Rings.
Green Hill Zone appears in LEGO Dimensions as the first part of the Sonic Dimensions Level Pack, along with being a part of the Sonic the Hedgehog Adventure World. Brick-built Moto Bugs, Buzz Bombers, Choppers, and Newtrons appear as enemies in the Level Pack. Tails' Lab (based on its appearance in Sonic the Fighters) and a shooting gallery modeled after Big the Cat and Froggy can be built in the Sonic the Hedgehog Adventure World's Green Hill Zone. The portal to the Adventure World is also modeled after one of Green Hill Zone's iconic loops.
In other media
Books and comics
Sonic the Comic
In the Sonic the Comic comic series and its spin-offs published by Fleetway Editions, Green Hill Zone was the first of the zones introduced in the comic. The zone was initially inhabited by the Freedom Fighters and several Emerald Hill Folks before they moved to the Emerald Hill Zone. Before then, this Zone was constantly targeted by Dr. Ivo Robotnik.
In the Sonic the Hedgehog comic series and its spin-offs published by Archie Comics, Green Hill Zone is a location that appeared on Mobius during both periods where Dr. Eggman and his accomplishes reshaped reality with the Genesis Wave. After the entirely of the Multiverse was altered by the Super Genesis Wave, Green Hill Zone became a permanent part of Sonic's World.
In the Sonic the Hedgehog comic series and its spin-offs published by IDW Publishing, Green Hill is a location on Sonic's world. Its past is virtually identical to its game counterpart's, up until after the events of Sonic Forces. It was mentioned by Tails, who explained that after the Eggman War, various Badniks remained without a commander and would wandered aimlessly around Green Hill. In the comic, there are occasionally other locations reminiscent of Green Hill as well.
In the Sonic the Hedgehog film series produced by Paramount Pictures and it spin-offs, Green Hill Zone is a region on Sonic's island. It is very similar to its game counterpart, featuring the Zone's iconic loops, vegetation, striped fields, and checkerboard hills.
Green Hill Zone is known for being one of the most famous and iconic video game levels of all time, with many referring to it as Sonic's equivalent of Super Mario Bros.'s World 1-1. It has received consistently positive opinions from critics, particularly for its music. Craig Snyder at MakeUseOf named the Zone as one of the five best levels in video games, calling it "a great way to prepare for what's to come". Shaun Munro of WhatCulture listed it as the second best level in video games, describing it as "such an immaculate level design that it's something developers still aspire to nowadays, though resolutely fail to live up to." He also praised the level's soundtrack and frenetic pace. Tim Turi from GameInformer found the level's music "catchy," and Wong ranked it as the thirteenth greatest piece of gaming music from the 16-bit era. In 2010, Sega's community manager, Aaron Webber, returned from a vacation to find his cubicle redecorated to resemble Green Hill; IGN's Levi Buchanan claimed that "everyone wants to come back to" this, and Owen Good of Kotaku exclaimed "I want to work in Green Hill Zone, too!" Writing for the Sabotage Times, Carl Anka ranked the original Sonic the Hedgehog as having the greatest music of any video game, largely as a result of Green Hill Zone's theme.
Critics have compared stages, particularly first stages, of later Sonic games to Green Hill Zone. Turi considers Emerald Hill Zone from Sonic the Hedgehog 2, Mushroom Hill Zone from Sonic & Knuckles, and Seaside Hill from Sonic Heroes to fit the same general mold as Green Hill Zone, noting repetition in Sonic level design and stating that "gamers have played Green Hill Zone dozens of times." However, he has opined that the Sonic Generations version of the original Green Hill "trounces them all" in both its 2D and 3D incarnations. Justin Baker of Nintendo World Report analogized Windy Hill from Sonic Lost World to Green Hill, while Carter thought similarly of The Legend of Zelda downloadable content levels.
Impact and legacy
Green Hill Zone has been recognized by critics as a classic, well-known video game level. It has been described as "classic" by Samit Sarkar of Polygon and by Jim Sterling and Chris Carter of Destructoid. Comparably, Joe Skrebels of Official Nintendo Magazine called it "nostalgic," while Christopher Grant from Joystiq considered it to have a place "in the center of your retro-gaming shrine." Kevin Wong of Complex stated that the game and Zone's popularity were such that "even if you didn't have a Genesis, this was the level you played at the department store while your parents went shopping." Andy Kelly from Computer and Video Games called the Green Hill theme a "monumental slice of Sega nostalgia," and GamesRadar writer Justin Towell also referred to it as classic. Anka has summarized that "Green Hill Zone in the original game has gone down as an instantly recognizable piece of music in pop culture."
To mark the Sonic series' 15th anniversary in 2006, Sega of Japan released a papercraft version of Green Hill as a PDF on its website. In 2011, not long after the release of Sonic Generations, Sega held a contest inviting gamers to upload playthroughs of the game's incarnation of Green Hill completed in under one minute and fifty seconds to YouTube; winners were eligible for Sonic merchandise.
- Green Hill is the most recurring Zone in the Sonic series, having appeared a total of twenty-three times, with Seaside Hill from Sonic Heroes being in second place.
- In Sonic Chronicles: The Dark Brotherhood, while Sonic reminisces on the "good times" he had in Green Hill Zone, Tails asks how Eggman's kidnapping of small animals and turning them into robots could have been "good times". Strangely, Tails first appeared in Sonic the Hedgehog 2 and never officially went through Green Hill Zone during the events of Sonic the Hedgehog.
- Green Hill Zone has reappeared multiple times, including in Sonic Battle, Sonic Chronicles: The Dark Brotherhood, and Super Smash Bros. Brawl. Tails appeared in Green Hill Zone in these games and more, but he does not seem to remember any of it in Sonic Generations. However, it should be noted that most of these appearances are non-canon, cameos, or both.
- Green Hills Zone, a Zone from Sonic the Hedgehog 2 (8-bit), is heavily based on Green Hill Zone, and shares its name in Japanese.
- Mecha Green Hill Zone, a Zone from Sonic Chaos, appears to be a mechanized version of Green Hill Zone.
- The beta name for Aquatic Ruin Zone was "Neo Green Hill Zone".
- The song "Dreams of an Absolution" has a similar tune to the background music of Green Hill Zone. Singer Lee Brotherton has said that this was not intended, but appreciated.
- Stage 1-1 of the Sonic Simulator from Sonic Colors is a rebuild of Act 1 of the 16-bit version.
- Sunset Hill, a Zone from Sonic Advance 3, is an homage to Green Hill Zone. Sunset Hill's music is also a remix of Green Hill Zone's music.
- A remix of Green Hill Zone's music is available as a track that the player can listen to in Mario & Sonic at the Olympic Games (Nintendo DS version).
- A Trance remix of the music that plays in Green Hill Zone called "Green Hill Zone (Crystiara Remix)" was performed by Hatsune Miku, a popular VOCALOID, and protagonist of another popular SEGA series.
- The beginning of Mega Water S's stage in Mega Man: The Wily Wars resembles Green Hill Zone.
- Interestingly, Green Hill is the name of various real-world places.
- Green Hill Zone appeared in fighting games such as Sonic Battle, Super Smash Bros. Brawl, Dengeki Bunko Fighting Climax, Super Smash Bros. for Nintendo 3DS and Super Smash Bros. Ultimate, making it a battlefield for five times.
- This is one of the Zones that was made into a Meccano play set, along with Chemical Plant Zone.
- Green Hill Zone is Sonic's favorite place.
- A level called Green Hill Zone is the second level in the platformer game Dash Dash. Besides the name, it has almost nothing in common with this stage.
- Even though Green Hill Zone does not appear in Sonic the Hedgehog Spinball, a preview for said game says that Dr. Robotnik went to the region to kidnap the Animals that lived there.
- When promoting the green tea brand "O~ii Ochya" (お～いお茶?), legacy composer Masato Nakamura from Dreams Come True created vocal version of Green Hill Zone's original theme song while promising a full version of the song that the snippet was featured in. The song itself was later titled "次のせ〜の！で – ON THE GREEN HILL – DCT VERSION" ("Tsugi no SE～NO! de – ON THE GREEN HILL – Dreams Come True VERSION", simplified to "On the Green Hill" in official Twitter hashtags) and was alluded to be shown first on Japan's Amazon Prime Video Show before its release on 7 July 2021. On the official 30th birthday of Sonic and with the release of the Sonic Symphony that same day, Shun Nakamura, as a break time guest, came to announce the fact that "On the Green Hill" exists specifically to Sonic fans. The single was released on 7 July 2021 with a page on the official Dreams Come True website detailing where the song can be found as well as the lyrics and Masa-san's written commentary about its creation. The song also got promotion from Amazon Music on the advertising displays of Akihabara's streets. The song has been used in SEGA promotions for the Sonic series, such as being able to play a TikTok version of Sonic that only uses one's face while the Mega Drive-inspired remix plays.
|Masato Nakamura||Sonic the Hedgehog||2:38|
|Masato Nakamura, Yuzo Koshiro||Sonic the Hedgehog (8-bit)||4:44|
|Masayuki Nagao||Sonic Drift||1:04|
|Kojiro Mikusa||Sonic Blast||1:55|
|Jun Senoue||Sonic Adventure 2||1:32|
|Tatsuyuki Maeda, Kenichi Tokoi, Hideaki Kobayashi||Sonic Battle||3:08|
|Masato Nakamura||Sonic the Hedgehog Genesis||1:37|
|Naofumi Hataya||Sonic Generations||1:49 (Act 1)|
|Jun Senoue||Sonic Generations||2:21 (Act 2)|
|Jun Senoue||Sonic Generations||2:22 (Act 2, Boost)|
|Tomoya Ohtani||Sonic Forces||2:47|
|Tomoya Ohtani||Sonic Forces||0:16 (Speed Shoes)|
|Dreams Come True (Masato Nakamura, Miwa Yoshida)||N/A||4:09|
- Sonic the Hedgehog (LeapFrog Didj) game design document, pg. 32.
- Sonic the Hedgehog (Sega Mega Drive) Japanese instruction booklet, pg. 28.
- Sonic the Hedgehog (Sega Game Gear) Japanese instruction booklet, pg. 17.
- TailsTube #1 (feat. Sonic). YouTube. Sonic the Hedgehog (24 March 2022). Retrieved on 24 March 2022.
- Sonic the Hedgehog (Sega Mega Drive) Japanese instruction booklet, pgs. 13-14.
- Sonic the Hedgehog 4 :: Episode I. Story. Sega. Archived from the original on 12 May 2013. Retrieved on 27 October 2017.
- Sonic the Hedgehog (Sega Game Gear) Japanese instruction booklet, pgs. 4-5.
- Sonic Forces - Classic Sonic Green Hill Gameplay. YouTube. Sega (25 April 2017). Retrieved on 26 September 2017. "Classic Sonic discovers Green Hill Zone is looking more dry and sandy under Eggman's rule, from the heavy desertification caused by his industries."
- Sonic Forces: Looming Shadow, "Looming Shadow"
- Grant, Christopher (26 June 2006). Build Sonic a papercraft playground for his Bday. Joystiq. Retrieved on 3 May 2014.
- Snyder, Craig (31 October 2013). 5 Of The Best Video Game Areas, Levels, And Dungeons. MakeUseOf. Retrieved on 4 May 2014.
- Munro, Shaun . 10 Best Video Game Levels Of All Time » Page 9 of 10. WhatCulture. Retrieved on 4 May 2014.
- Turi, Tim (18 April 2011). Sonic Generations: Bridging A 20-Year Generation Gap With Two Gameplay Styles. Game Informer. Retrieved on 3 May 2014.
- Wong, Kevin (5 September 2013). The Best Video Game Music of the 16-Bit Era. Complex. Retrieved on 14 May 2014.
- Buchanan, Levi (12 August 2010). Who Wants to Work in the Green Hill Zone?. IGN. Retrieved on 3 May 2014.
- Good, Owen (12 August 2010). Prank Redecorates Sega Desk As Green Hill Zone. Kotaku. Retrieved on 3 May 2014.
- 10 Of The Best Original Videogame Soundtracks. Sabotage Times (18 June 2013). Retrieved on 15 May 2014.
- Baker, Justin (28 May 2013). First Trailer for Sonic Lost World Released. Nintendo World Report. Retrieved on 3 May 2014.
- Skrebels, Joe (8 September 2013). Sonic Lost World preview. Official Nintendo Magazine. Retrieved on 3 May 2014.
- Carter, Chris (18 December 2013). A very brief, but welcome joyride. Destructoid. Retrieved on 3 May 2014.
- Sarkar, Samit . Sonic: Lost World gameplay footage shows off three very different levels. Polygon. Retrieved on 3 May 2014.
- Sterling, Jim (9 June 2011). E3: Sonic Generations might get more than a 4.5. Destructoid. Retrieved on 3 May 2014.
- Kelly, Andy (28 April 2012). Video game soundtracks: The 100 best themes of all time (Part 1). Computer and Video Games. Retrieved on 14 May 2014.
- Towell, Justin (20 July 2011). Hands-on with Sonic Generations on 3DS reveals 1991 Green Hill Act 1 layout... in 3D. GamesRadar. Retrieved on 15 May 2014.
- Good, Owen (2 November 2011). Run Green Hill Zone in Under 1:50 and Collect Some Nice Sonic Merch. Kotaku. Retrieved on 3 May 2014.
- Dreadknux (18 February 2008). INTERVIEW: Remix Factory. Sonic Stadium. Archived from the original on 18 February 2008.
- Mean Machines: 11. August 1993.
- MegaTech: 11. 1993.
- Sonic the Hedgehog (@SonicOfficialJP) on Twitter (Japanese). Twitter. Archived from the original on 19 May 2021. Retrieved on 19 May 2021.
- Masablog (Japanese). Dreams Come True (29 May 2021). Archived from the original on 29 May 2021. Retrieved on 2 June 2021.
- 次のせ〜の！で – ON THE GREEN HILL. Dreams Come True.
- Green Hill Zone at Wikipedia, the free encyclopedia.