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Sonic the Hedgehog 4: Episode II (ソニック・ザ・ヘッジホッグ4 エピソードII Sonikku za Hejjihoggu Fō: Episōdo Tsū?) is a 2012 platformer video game developed by Dimps with assistance from Sonic Team and published by Sega. It is a direct follow-up of Sonic the Hedgehog 4: Episode I. Sonic the Hedgehog 4: Episode II was released in May 2012 for PC (via Steam), PlayStation Network, Xbox Live Arcade, Android and iOS. As with Sonic the Hedgehog 4: Episode I, the game is intended to emulate the original Sonic titles on the Sega Mega Drive.

In addition, players who owned both episodes of Sonic the Hedgehog 4 on the same systems were granted Sonic the Hedgehog 4: Episode Metal.

Official website plot

A few months after the events of Episode I, Little Planet, where Sonic CD took place, approaches once more. Dr. Eggman, who was defeated in the previous installment, knew that it was only the beginning of his big scheme that he had been planning in secrecy. Dr. Eggman planned the entire plan from the very beginning of Episode I.
Hearing that Little Planet has finally returned, Eggman eagerly hops back into action, the next phase of his scheme will begin to unfold. Elsewhere, Sonic the Hedgehog's old robot rival Metal Sonic has survived his defeat back in CD, though was left on Little Planet when it disappeared before. Eggman finds the Metal hedgehog and has made him even more powerful than before making Sonic no match for him.
Meanwhile, Sonic has found out about the Doctor and Metal Sonic being back, so he recruits his buddy Miles "Tails" Prower to help him face this new threat and set off to stop Eggman's latest scheme.
What was Dr. Eggman searching for in the Lost Labyrinth? What was Mad Gear built for? They were all a mere puzzle piece of a grandiose project schemed by Dr. Eggman. When Little Planet reappears, Dr. Eggman’s whole scheme will be revealed!


Spoiler warning: Plot, ending details or any kind of information follow.

After the events of Sonic the Hedgehog 4: Episode I, Sonic and Tails are riding the Tornado through the clouds. Sonic tells Tails to land into Sylvania Castle Zone. They then make their way through the castle and eventually defeat Dr. Eggman in his new contraption: the Egg Serpentleaf.

Metal Sonic confronting Sonic and Tails.

They head into Eggman's amusement park amidst the snow mountains of White Park Zone, where they see a mechanical construction surrounding Little Planet in the skies above. They then come face to face with Metal Sonic on Tails' Rocket. He hops off and they battle. Sonic and Tails are victorious and they head to Eggman's newest base, the Oil Desert Zone. They then defeat Eggman's new Egg Scrap Mech and pursue him into the air on the Tornado, but are suddenly attacked by Metal Sonic in the new Metal Carrier. They land on the Sky Fortress Zone and manage to defeat Metal Sonic.

Eggman and Metal Sonic then flee to the Death Egg mk.II Zone, metallized around Little Planet. Sonic and Tails then defeat Metal Sonic and Eggman, pursuing Metal Sonic. They defeated him in a race similar fashion in Stardust Speedway from Sonic CD, leaving him out of the picture for the time being. The heroic duo make it to the heart of the Death Egg mk.II, where they defeat Eggman's new Egg Heart. The battle causes the Death Egg mk.II to be destroyed, but Sonic and Tails manage to escape in two escape pods and land down to Sonic's world, while the Death Egg mk.II is drained of its power and is left deactivated in space. However, the metallic shell is not broken, and Little Planet is presumably still trapped inside the Death Egg mk.II.

Official website description

Episode II

Metal Sonic has returned to form a formidable alliance with Dr. Eggman. To face this new threat, Sonic will have to call upon an old friend to help him save the day. Joined by Tails, they utilize ingenious combination moves and race across four brand new Zones, in order to put an end to their evil plans. Play alone, or with a friend locally (and online), in an evolution of Sonic 2's collaborative gameplay! Unleash Sonic and Tails’ devastating joint attacks and combination moves to fight the united force of Metal Sonic and Dr. Eggman. Episode II features an all new game engine, bringing you updated physics and an original graphical style as you race through 4 unique Zones and a new Special Stage based on the one from Sonic 2.

Episode Metal

Sonic the Hedgehog 4: Episode Metal is an extra Episode of Sonic the Hedgehog 4 in which the player plays through harder versions of Episode I levels as Metal Sonic. Its story ties in with Episode II's story, much like Knuckles' story in Sonic the Hedgehog 3 & Knuckles. It shows how Eggman restored Metal Sonic to power, how Metal Sonic received even more power by absorbing an energy orb in the Lost Labyrinth, and that Metal Sonic found Tails' rocket at the end of Splash Hill Zone. This Episode is actually not downloaded separately; it is part of Episode II, and if the game detects an Episode I save file with at least Splash Hill Zone Act 1 cleared, the content is unlocked. All the player must do is complete Sylvania Castle Zone Act 1, back out of the level select, and then go back into level select. This is available on PC, PlayStation 3, Xbox 360, Android and iOS.


Sonic and Tails activating the Copter Combo.

Sonic the Hedgehog 4: Episode II plays similar to the previous episode, but with several enhancements. Sonic is now accompanied by Tails, either controlled by the computer or a second player via local or online co-operative play (online support is not included on Android version due to lack of Socal gaming support although there's no word if Google Play Games services will be added in the next Android update). Unlike in the 16-bit titles, Tails cannot be played in single player and likewise Sonic can't be played on his own here. There are also new various combination moves that can be performed together, such as Tails lifting Sonic up to places he would be unable to reach otherwise, and the two can roll into a ball to perform a fast and powerful spin attack.[11]

Special Stages in Sonic the Hedgehog 4: Episode II, also accessed the same way they are in Sonic the Hedgehog 4: Episode I, are based on the half-pipe style format introduced in Sonic the Hedgehog 2, in which the player is required to collect a certain number of rings before the goal in order to obtain a Chaos Emerald. Also returning are the Red Star Rings that have previously appeared in Sonic Colors and Sonic Generations. One Red Ring is hidden per act, and an Achievement or Trophy is unlocked after collecting them all. There is also cross-compatibility planned for the XBLA and Windows Phone 7 versions, allowing players to alternate their games between them using Cloud Saving.

Owners of both Sonic the Hedgehog 4: Episode I and Sonic the Hedgehog 4: Episode II (provided they are both on the same unit) will unlock free Sonic the Hedgehog: Episode Metal content in Sonic the Hedgehog 4: Episode II. Sonic the Hedgehog: Episode Metal explains how Metal Sonic came back to life after being defeated in Sonic the Hedgehog CD. Players play as Metal Sonic through four Acts, all of which are reworked Zones from Sonic the Hedgehog 4: Episode I, explaining the significance of those Zones to the story as well.

Scoring system


Image Characters Biography
Sonic Sonic 4.jpg Sonic the Hedgehog After the battle from Episode I, Sonic's rest comes to an end as Little Planet re-approaches. Sonic finds out that Eggman is back in action on the neighboring continent. He sets off on the Tornado to investigate the continent with his sidekick, Miles "Tails" Prower. His best friend.
Tails Sonic 4.jpg Miles "Tails" Prower Sonic's sidekick (who first appeared in Sonic 2) who made the rocket to head to E.G.G Station and was secretly supporting Sonic in Ep: I. In Ep: II he's back in center stage as an active sidekick who Sonic can rely on. He can fly by rotating his 2 tails and will assist Sonic with the Combo Moves in Ep: II.
Metal Sonic Sonic 4.jpg Metal Sonic The worthy opponent who was thought to be destroyed during the battle of Stardust Speedway in "Sonic CD". He was in fact severely damaged,and left alone on Little Planet for years. Now as the Little Planet re-approaches, and with the close support of Dr. Eggman, Metal Sonic is resurrected and back in full force. Ready to have a rematch with our true blue hero.
Dr. Eggman Sonic 4.jpg Dr. Eggman Dr. Eggman's E.G.G Station was destroyed in Episode: I. However as Little Planet re-approaches, the grand project set up by Dr. Eggman has now come into its 2nd stage, under a veil of secrecy and stealth.





Enemy Biography
A Boar type robot newly developed by Dr. Eggman based on his research results from Episode I. They have been created with rich color variation, but Sonic should be extra careful of the formidable red ones that come charging towards him.
Badniks2 spikes.png
A Hermit crab type robot which has been newly developed for cold regions. The spines on its hard shell will repel any attacks done by Sonic alone. There must be another way to defeat it...
Badniks2 steelion.png
A newly developed subaquatic Sealtype robot. Its breath can freeze the water around them in an instant, creating obstacles when Sonic needs to look for air bubbles.
A newly developed Kingfisher inspired robot. It usually flies over the water surface, but as it finds Sonic and Tails underwater, it will dart down at them.
Scarabesque Sonic 4.png
A Dung Beetle type Badnik designed for use in desert areas. It can generate an infnite amount of large boulders that explode while rolling. A troublesome enemy that is always there in undesirable places.
Sandworm Sonic 4.png
A newly developed large Centipede type Badnik designed for use in desert areas. You never know when they will suddenly emerge from quicksand, and be mindful of its robust body that is resistant to attacks.
Bubbles Bubbles is a balloon fish type robot who returns back from the ruins of Angel Island. Due to Eggman's budget cuts, not all versions of Bubbles are spiked. However, watch out for the red ones!
Mantis Sonic 4.png
A Grasshopper type robot which was also featured in "MARBLE GARDEN ZONE" in "Sonic 3". Since they can suddenly jump without notice, their moves are unpredictable. Be careful not to bump into them.
Flamer Sonic 4.png
A new series of Sea Urchin type robots which were developed based on the "Orbinauts" & "Spike Spinners" featured in Episode I. The blasting flames of the burners are certainly dangerous, but those fires will spread widely in oily places. Take extra care.
Turtloids Sonic 4.png
A Turtle type Badnik last seen in "SKY CHASE ZONE" in "Sonic 2". It serves as a guardian of Metal Sonic's weapon unit "Metal Carrier."
Badniks2 snowy.png
A newly developed Polar Bear type robot for cold regions. It's specialty is unleashing powerful attacks with its super heavy body. Its body is also tough, and this makes it a formidable enemy that will not be taken down with just a few attacks.
Clucker Sonic 4.png
A Chicken type Badnik last seen defending "WING FORTRESS ZONE" in "Sonic 2". They will stand in Sonic and his friends' way, deployed everywhere within the incredibly enormous "Sky Fortress" as fixed batteries.
Chop Chop.png
Chop Chop
A Piranha inspired robot which was last seen in "AQUATIC RUIN ZONE" in "Sonic 2". It lurks underwater hunting for its next victim. Once they spot Sonic and his friends, nothing will stop their rapid approach and attempt to crush them with its powerful jaw.
Balkiry Sonic 4.png
A battle plane type bird robot last seen in "SKY CHASE ZONE" from "Sonic 2". A whole bunch of them can be shot out of Metal Sonic's weapon unit, "Metal Carrier", in Episode II.

Animal Friends


Two uncovered Zones of the map.

Key items

Item Box Power-Ups

  • Super Ring (Holds 10 rings)
  • 1-Up (Extra life)
  • Power Sneakers (Makes you run faster for a limited time)
  • Invincible (Makes you invincible for a limited time)
  • Shield (Protects you from a single hit)
  • Combo Attack (A golden item box that makes Sonic and Tails attack all enemies on-screen and gives you points and rings if you score enough, by pressing the jump button repetadly.)

Special Stages

Sonic and Tails in the Special Stage.

Special Stages in Sonic the Hedgehog 4: Episode II play akin to the Special Stages in Sonic the Hedgehog 2. Like in Sonic the Hedgehog 2, Sonic and Tails must collect a certain amount of rings, the amount increases after hitting a checkpoint though, unlike Sonic the Hedgehog 2, Tails can collect rings, but will not lose his share if he touches any bombs, although this is only true for Single Player. Also, unlike Sonic the Hedgehog 2, the player can boost by holding the Tag Action button, and while there is no time limit, there is a timer, used for Time Attack scores.


In February 2011, Sonic the Hedgehog 4: Episode II was confirmed to be in early development. Sega Brand Manager Ken Balough mentioned that "the idea is to introduce new zones with things you haven't seen." He had also hinted that Sonic the Hedgehog 4: Episode II may have a larger budget than Sonic the Hedgehog 4: Episode I, due to the latter being received very well commercially. Balough also mentioned that many ideas for Sonic the Hedgehog 4: Episode I were planned while the first episode was being developed. [17] Sega of America Community Manager Aaron Webber also hinted that Tails may appear in Sonic the Hedgehog 4: Episode II as well.[18] On 23 August 2011, Sonic Team head Takashi Iizuka stated that “this year, 2011, is the anniversary, so we’re focusing on the celebration title, but moving forward to 2012, Sonic will still be going, so I’d hope to provide Episode 2 then.” He also said that Sonic Team “knew about the anniversary year," and that "Generations was planned way in advance," therefore "it was always our plan to release Episode 2 after Generations.”[19] In preparation for the release of Sonic the Hedgehog 4: Episode II, Sega re-released Sonic the Hedgehog CD to digital platforms in winter 2011, billing it as a "prequel" to Sonic the Hedgehog 4. The events of Sonic the Hedgehog 4: Episode II would rely heavily on what occurred in Sonic the Hedgehog CD.

On 29 December, some new information on Sonic the Hedgehog 4: Episode II was revealed along with a teaser trailer, including the return of both Metal Sonic and Tails, and an updated graphics and physics engine. Platforms confirmed for release are Xbox Live Arcade, PlayStation Network, iOS, Android, Windows Phone 7 and PC.[20][21] It was also confirmed that no Wii version of Sonic the Hedgehog 4: Episode II would be released due to hardware constraints.[22][23]

On 21 April 2012, Sonic the Hedgehog 4: Episode II was accidentally temporarily released to people who confirmed their pre-order of the game on Steam before it was removed the next day. Known as the "Beta 8" edition, it was quickly dismissed by Ken Balough as an early prototype version that does not necessarily represent the final version, although it was instead found to be virtually complete with very minimal differences. [24]

iOS incompatibility

Due to a near complete rewrite of iOS for the iOS 7 update, this game was no longer compatible with iOS devices running on iOS 7. Sega has announced that they are working on a fix, but nothing related to the game had been released. The fans of the game were unsure as to if game's iOS support has been scrapped or not. They fixed the game on January 11, 2016 with an official update, and put the game back in the store along with the first episode of the game.

Future episodes

As of March 2012, Sega currently has no plans for Sonic the Hedgehog 4 beyond Sonic the Hedgehog 4: Episode II. Takashi Iizuka says that Sega is looking forward to user feedback and wants to see how users accept this episode. During the PAX East 2012, Cheat Code Central spoke with Sega representatives who informed that the company would be taking Sonic games "one at a time". It was said that if Sonic the Hedgehog 4: Episode II sold well, an Episode III will likely be developed, as well as a possible Episode IV if that does well in turn. However, in January 2015 in a Facebook interview with pre-Sonic the Hedgehog 4 Brand Manager Ken Balough, he confirmed that Episode III was scrapped[3].


Aggregate scores
Aggregator Score
GameRankings (PS3) 63.33%[4]
(X360) 61.32%[5]
(PC) 52.00%[6]
(iOS) 73.57%[7]
Metacritic (PS3) 63/100[8]
(X360) 61/100[9]
(PC) 51/100[10]
(iOS) 66/100[11]
Review scores
Publication Score B+
Electronic Gaming Monthly 6.5/10
Game Revolution 2/5 stars
GameSpot 6/10
GamesRadar 2.5/5 stars
GameTrailers 5.5/10
IGN 6.5/10
Digital Spy 2/5 stars

Sonic the Hedgehog 4: Episode II received mixed response from videogame critics.

IGN's Lucas M. Thomas gave the game a score of 6.5, stating that while it fixes the physics problems of Sonic the Hedgehog 4: Episode I, it is still missing the "magic" of its Genesis predecessors.[12] GamesRadar+'s Lucas Sullivan criticized it in similar ways, stating that the two-player mode "seems to prioritize griefing your friends instead making real in-game progress," and further stating that "every time we felt like we were reliving our old Sonic glory days, the next stage would incorporate limp and uninspired gimmicks like shifting winds or avalanche snowboarding."[13] Electronic Gaming Monthly's Ray Carsillo gave the game a 6.5, praising the "old-school Sonic" aspects of the gameplay, but criticizing the Tails-related gameplay, stating "there were too many puzzles that required Tails' assistance."[14] Joystiq's Richard Mitchell had mixed feelings on the game as well, awarding it 3 out of 5 stars, and stating "Episode 2 makes improvements over its predecessor, with better visuals, useful co-op maneuvers and great special stages, but the inconsistent boss battles and uninspired level design keep it from recapturing Sonic's glory days."[15] GameTrailers gave the game a score of 5.5, saying that the level design and the team-up moves often slow the pace of the game.[16] Official Xbox Magazine's (UK) Jon Blyth was more positive, concluding that the game was "a smooth, slippery Sonic that takes another step away from it's single-button origins without losing any of the hog essence. With local and online co-op, it offers just enough entertainment to justify its steep episodic price."[17]


These are the achievements and trophies for the Xbox 360, PlayStation 3, Steam and iOS versions of Sonic the Hedgehog 4: Episode II.

Image Name Description Trophy Class Xbox Live Gamescore iOS Game Center Points
The Adventure Begins.png The Adventure Begins Clear SYLVANIA CASTLE ZONE, Act 1. Bronze 5 50
Rolling Combo!.png Rolling Combo! Activate the Rolling Combo with Sonic and Tails. Bronze 5 50
Metal Sonic Falls.png Metal Sonic Falls Defeat Metal Sonic in SKY FORTRESS ZONE, Act 1. Bronze 5 50
A Golden Wave.png A Golden Wave Defeat all bosses as Super Sonic. Bronze 10 50
All Stages Cleared! (S4E2).png All Stages Cleared! Defeat the final foe and watch the ending. Bronze 10 100
Tag Partner.png Tag Partner Upload a Multiplayer score or time. Bronze 10 100
I Love Tails.png I Love Tails Play as Tails 50 times. Bronze 10 100
Ring Collector (S4E2).png Ring Collector Beat Special Stage 1 after collecting every Ring. Bronze 15 100
Endurance Race.png Endurance Race Clear all stages without returning to the World Map. Silver 25 100
All Chaos Emeralds Found!.png All Chaos Emeralds Found! Collect all seven Chaos Emeralds. Silver 30 100
Proof of Speed.png Proof of Speed Clear SYLVANIA CASTLE ZONE, Act 1 in one minute or less. Silver 35 100
All Red Star Rings Found!.png All Red Star Rings Found! Defeat the final foe after collecting every Red Star Ring. Gold 40 100



  • This is the first game since Sonic & Sega All-Stars Racing or Sonic the Hedgehog (2006) for a main series game to have Tails as a playable character (not counting the digital re-release of Sonic the Hedgehog CD).
    • Also in creativity for promoting Tails, the art and styling for the game's pre-release box art represents Tails' two tails in place of the number two. This is also featured in the game's teaser trailer.
  • The color of Sandworm looks very similar to its previous iteration, Caterkiller.
  • During the first boss, before the fight actually occurs, the game pokes fun at Sonic the Hedgehog 4: Episode I's use of rehashing by tricking players into thinking the boss would be a variation of the Aquatic Ruin Zone boss from Sonic the Hedgehog 2. After the totem poles pop up, however, the Egg Serpentleaf destroys the poles before initiating the battle.
  • This is the second Sonic game to feature Tails carrying Sonic underwater, following Sonic Advance 3 with Tails' mid air tag action.
  • This game celebrates the twentieth anniversary of Sonic the Hedgehog 2. As well as the title card paying homage to said game (which is similar to how Sonic the Hedgehog 4: Episode I pays homage to the original Sonic the Hedgehog), the Special Stages are given a similar style to that game. This style of Special Stage was also previously used in Sonic 3D Blast, Sonic the Hedgehog Pocket Adventure, Sonic Rush, and Sonic Colors (DS version)
    • This game also celebrates the twentieth anniversary of Tails' first appearance.
  • The snowboard from Sonic the Hedgehog 3 and Sonic Adventure in IceCap Zone returns in White Park Zone Act 1.
  • The music in the second trailer is a remix of the menu music from Sonic & SEGA All-Stars Racing. It was rumored that remix would be in the game, but it was nowhere to be found.
  • Red Star Rings make a return, although they only exist for the achievement/trophy in game.
  • The warning signs from Sonic Generations make a return in this game.
  • Super Sonic is playable in ordinary boss fights, making this the first time since Sonic the Hedgehog 3 & Knuckles for doing so to be possible.
  • According to the world map of Sonic the Hedgehog 4: Episode II and Sonic the Hedgehog 4: Episode Metal, Sylvania Castle Zone, White Park Zone and Oil Desert Zone are adjacent and are on the same island of the Sonic the Hedgehog 4: Episode I world map.
  • Due to a mistake on Steam, very few lucky players who purchased Sonic the Hedgehog 4: Episode II were able to play through the "Beta 8" version of the whole game and Episode Metal on 14 April. The Beta 8 is a near-final with the inclusion of a hidden debug command for 99 Rings, although there are some performance issues with full screen on some computers and very occasionally textures will fail to load properly (noticeable in Sylvania Castle Zone's trees and the Death Egg mk.II on the map screen). The Beta 8 was made unavailable the next day and Steam locked its playability.
  • Unlike Sonic the Hedgehog 4: Episode I, Sonic the Hedgehog 4: Episode II contains 3D cutscenes. In at least the Android and iOS versions, the cutscenes are FMVs and not done in-engine, using videos ripped from console and PC gameplay - an inverse since the previous game was primarily developed for iOS rather than the other way around.
    • Due to this, there are slight graphical discrepancies, the most noticeable of which is at the beginning of the first Act. In the console/PC version, the Tornado lands and Sonic and Tails jump onto the ground, immediately starting the level with no fade-out or loading time. The Android and iOS versions fade-out to black right after the cutscene and then begin the level.
  • Unlike the Special Stages in Sonic the Hedgehog 4: Episode I, this game's Special Stages do not contain a time limit; rather, a Time Bonus is rewarded at the end of the stage depending on how long it takes the player to finish.
    • Additionally, when Sonic and Tails pass through a gate with insufficient Rings, there is no "Not Enough Rings..." message and thumbs-down icon appearing. Instead, an animation of Sonic and Tails stopping and looking disappointed is seen.
  • Oddly, the Chaos Emeralds in this game seem to be bigger than Sonic's head.
  • The Special Stages, while being based on those seen in the 16-bit version of Sonic the Hedgehog 2, have a feature that is also included in Sonic Rush and Sonic Colors which is jumping at the end of the right and left sides of the track.
  • Super Sonic's physics remain unchanged from Sonic the Hedgehog 4: Episode I because Sonic Team did not see any problem with them, according to Ken Balough.[citation needed]
  • On the icon for the trophy/achievement for getting all the Chaos Emeralds, the order of the Chaos Emeralds is flipped vertically from the order in Sonic the Hedgehog 4: Episode I.
  • While Sonic the Hedgehog 4: Episode I did not feature any kind of Retina support, Sonic the Hedgehog 4: Episode II features it for the iPhone 4 and iPod touch (4G) and newer, but not for the iPad 3.
  • A comic adaptation was made for the game and was featured in Sonic Super Special Magazine #3.
  • Sonic's victory pose after a boss battle resembles his artwork for Sonic Advance.
  • The in-game description refers to the Tornado as Tails' plane. This is incorrect, as the original Tornado model airplane belongs to Sonic.
  • This game and Sonic Generations are the only games where Sonic can de-transform from his Super state at will; even then, it is only possible in Generations in Planet Wisp by using a Color Power. In Sonic the Hedgehog 4: Episode II, it can be done anytime simply by performing a Tag Action. It is extremely helpful if the player wants to conserve rings.
  • Unlike Sonic the Hedgehog 4: Episode I, only one boss in this game (the redux of the Stardust Speedway boss on the Death Egg mk.II) is based on a boss from the classic Mega Drive games.
  • There are slight graphical differences between the mobile versions and the console/PC versions:
    • When Tails walks in front of or behind Sonic, he becomes slightly translucent in the PC/console versions. This effect is lost in the mobile versions.
    • The lower quality iOS version (for iPhone and iPod touch) removes Sonic and Tails' facial expressions during levels. They're still present in the cutscenes, however, as those are from the PC/console versions.
    • The ripples in the air that Sonic makes when he performs a homing attack are not present in the mobile versions, as with the previous episode.
  • The shapes of the continents on Sonic's world in Sonic the Hedgehog 4: Episode II are shaped differently than Sonic the Hedgehog: Episode I.
  • The ending music of every stage in the game seems to be a remade version of Sonic the Hedgehog (2006)'s stage clear music.


Official trailers


  1. LordDullahan (8 July 2013). Sonic the Hedgehog 4 Episode I and II are Now Available on OUYA! Sonic CD to follow.. SEGA Blog. Sega. Archived from the original on 12 July 2013.
  3. Sonic the Hedgehog 4: Episode III is NEVER HAPPENING. Maybe.. 16 July 2015. Archived from the original on SEGA Forum.
  4. Sonic the Hedgehog 4: Episode II (PlayStation 3). GameRankings. Retrieved on May 23, 2012.
  5. Sonic the Hedgehog 4: Episode II (Xbox 360). GameRankings. Retrieved on August 26, 2013.
  6. Sonic the Hedgehog 4: Episode II (PC). GameRankings. Retrieved on August 26, 2013.
  7. Sonic the Hedgehog 4: Episode I (iOS). GameRankings. Retrieved on July 4, 2013.
  8. Sonic the Hedgehog 4: Episode II for PlayStation 3. Metacritic. Retrieved on May 23, 2012.
  9. Sonic the Hedgehog 4: Episode II for Xbox 360. Metacritic. Retrieved on May 23, 2012.
  10. Sonic the Hedgehog 4: Episode II for PC. Metacritic. Retrieved on May 23, 2012.
  11. Sonic the Hedgehog 4: Episode II for iOS. Metacritic. Retrieved on July 4, 2013.
  12. Thomas, Lucas M. (18 May 2012). Sonic the Hedgehog 4: Episode II Review. IGN. Retrieved on 11 December 2012.
  13. Sullivan, Lucas (May 15, 2012). Sonic the Hedgehog 4: Episode II review. GamesRadar. Retrieved on May 22, 2012.
  14. Carsillo, Ray (15 May 2012). EGM Review: Sonic the Hedgehog 4: Episode II. EGMNOW. Retrieved on 22 May 2012.
  15. Mitchell, Richard (16 May 2012). Sonic the Hedgehog 4: Episode 2 review: Running in place. Joystiq. Retrieved on 22 May 2012.
  16. Sonic the Hedgehog 4: Episode II Review. GameTrailers (21 May 2012). Retrieved on 11 December 2012.
  17. Blyth, Jon (17 May 2012). Xbox Live Arcade Review: Sonic the Hedgehog 4: Episode 2 Review. Retrieved on 22 May 2012.

External links

Sonic the Hedgehog 4: Episode II

Sonic the Hedgehog console mainline games
Sonic the Hedgehog mobile games