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Sonic the Hedgehog 2 (16-bit)

From Sonic Retro

(Redirected from Sonic 2)
"Sonic the Hedgehog 2" and "Sonic 2" redirect here. For the 8-bit version, see Sonic the Hedgehog 2 (8-bit). For the remake, see Sonic the Hedgehog 2 (2013). For similarly-titled media, see Sonic the Hedgehog 2 (disambiguation).

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Sonic the Hedgehog 2
System(s): Sega Mega Drive, Virtual Console, Nintendo Switch Online, Steam, RealOne Arcade
Publisher: Sega
Developer:
Sound driver: SMPS Z80 (modified) (SMPS 68000/Sonic the Hedgehog port)
Genre: Action[1][2]
Number of players: 1-2
Release Date RRP Code Rating
Sega Mega Drive
JP
1992-11-21[2] ¥6,800 G-4088
Sega Mega Drive
US
1992-11-24 $54.99[3][4] 1051
Sega Mega Drive
EU
1992-11-24 €? 1051
Sega Mega Drive
UK
1992-11-24 £39.99[5] 1051
Sega Mega Drive
CA
1992 $? ?
Sega Mega Drive
AS
1992  ? 1051-40
Sega Mega Drive
KR
1992-11-21 ₩6,800 GM8073JG
Sega Mega Drive
AU
1992-12-01 $89.95[6] FSON01SMC
Sega Mega Drive
AU
(sgc)
199x $? FSON01SMC
Sega Mega Drive
BR
1992 R$? 044130
Sega Mega Drive
BR
(Red)
199x R$? 044130
Tectoy: Todas as Idades
Sega Mega Drive
DE
1992-11-24 DM 99.95[7] 1051
Sega Mega Drive
ZA
199x  ? ?
Sega Mega Drive
SE
(r)
199x  ?kr ?
Sega Mega Drive
GR
199x  ? ?


Wii Virtual Console
JP
2007-06-19[8] 600[9]pts ?
CERO: A
Wii Virtual Console
US
2007-06-11[10] 800[10]pts ?
ESRB: Everyone
Wii Virtual Console
EU
2007-07-06[11][12] 800[11]pts ?
PEGI: 3+
Wii Virtual Console
AU
2007-07 800[13]pts ?
OFLC: General (G)


Nintendo Switch Online
JP
2021-10-26[14] ¥sub ?
Nintendo Switch Online
US
2021-10-25[15] $sub ?
Nintendo Switch Online
EU
2021-10-26[16] €sub ?
Nintendo Switch Online
UK
2021-10-26[17] £sub ?
Nintendo Switch Online
AU
2021-10-26[18] $sub ?


RealOne Arcade
US
2002-12-05[19] $? ?
Steam
EU
2011-01-26[20] €4.49[21] 71163
PEGI: 3+
Steam
DE
2011-01-26[20] €4.49[21] 71163
USK: 6
Steam
UK
2011-01-26[20] £3.99[21] 71163
PEGI: 3+
Steam
US
2011-01-26[20] $4.99[21] 71163
ESRB: Everyone
Steam
AU
2011-01-26[20] $6.99[21] 71163
OFLC: General (G)
Steam Linux
EU
2019-01-31[22] €4.49[23] 71163
PEGI: 3+
Steam Linux
DE
2019-01-31[22] €4.49[23] 71163
USK: 6
Steam Linux
UK
2019-01-31[22] £3.99[23] 71163
PEGI: 3+
Steam Linux
US
2019-01-31[22] $4.99[23] 71163
ESRB: Everyone
Steam Linux
AU
2019-01-31[22] $5.99[23] 71163
OFLC: General (G)
Steam OS X
EU
2019-01-31[22] €4.49[23] 71163
PEGI: 3+
Steam OS X
DE
2019-01-31[22] €4.49[23] 71163
USK: 6
Steam OS X
UK
2019-01-31[22] £3.99[23] 71163
PEGI: 3+
Steam OS X
US
2019-01-31[22] $4.99[23] 71163
ESRB: Everyone
Steam OS X
AU
2019-01-31[22] $5.99[23] 71163
OFLC: General (G)

Sonic the Hedgehog 2 (Japanese: ソニック・ザ・ヘッジホッグ 2) is the highly successful sequel of the original Sonic the Hedgehog for the Sega Mega Drive. Put into development not long after the completion of the first game, the title would go on to become one of the most successful video games of all time, selling millions of units and cementing the franchise as a cultural phenomenon in the west.

Introducing Miles "Tails" Prower in the role he was created for to the Mega Drive, the game was released worldwide on November 24th, 1992. Dubbed "Sonic 2sday," the simultaneous release was an unusual move for the time. The game eventually replaced the original Sonic the Hedgehog as the default pack-in title for the Mega Drive, being bundled with the redesigned Mega Drive II model.

The game is also the first in the "Death Egg Saga", a storyline that would continue in the sequels Sonic the Hedgehog 3, Sonic & Knuckles, and Sonic the Hedgehog 4.

Story

Some time after stopping Dr. Eggman once again, Sonic the Hedgehog grows restless, deciding to do what he does best - travel the world, looking for adventure. Climbing into his trusty biplane, the red-and-white Tornado, the blue hedgehog begins flying the skies, looking for places unknown. On nothing more than an impulse, Sonic decides to land on an unassuming island, called West Side Island. Deciding to kick back and explore the isle, Sonic is completely oblivious to the legend connected to the island, and the similarities it has in relation to his adventures on South Island. According to legend, there was once a great and prosperous people who lived on its shores, who achieved their greatness through the use of mysterious, powerful stones. Their peace could have been everlasting if not for a select few who desired to use the stones for their own selfish gains, causing the gods to take away the stones and hide them away on the island...

A few days after landing, Sonic realized that he was being followed by someone. Looking behind him, Sonic spotted a young fox, who immediately hid from the blue hedgehog when he looked his way. Not thinking much of it, Sonic ran off, the fox once again following. The young fox's given name, Miles Prower, was overshadowed by his nickname, "Tails," derived from the fact that he possessed not one but two tails behind him. Often being ridiculed by his peers, "Tails" outlook on life changed immediately once he spotted Sonic running around his home, deciding that he had to follow and emulate his new hero, wanting to be just as cool and confident. No matter where Sonic would go, Miles would try and follow, Sonic eventually accepting the near-constant trailing of the young fox.

Not long after, during a brief moment when "Tails" was exploring the beaches of West Side on his own, he came across the Tornado, glittering in the sun. Spotting it in the distance, he became extremely excited, running as fast as he could towards it. Engrossed in its design, he wondered who the plane belonged to. He didn't have to wait too long when, out of the corner of his eye, the fox spotted the distinct image of Sonic, taking a nap under one of the wings. This newfound knowledge was not given much time to process in "Tails" mind when suddenly a loud explosion echoed through the air, shocking Sonic awake.

Looking beyond the Emerald Hill Zone, a large pillar of fire could be seen, accompanied by a new, yet familiar, army of mechanical robots. It only took a second for Sonic to guess who had caused the explosion, cursing Eggman's name and running into the thick of it. Without hesitation, Miles Prower followed behind, knowing that he had to be right at Sonic's side.

His laugh echoing in the wind, Eggman couldn't help but gloat over his newest plan, being grateful for having the foresight to follow Sonic to West Side Island. Learning of the legend of the island, Eggman came to the realization that the legendary stones talked of could only be the Chaos Emeralds, this island being the true resting place of not only the six from before, but of a seventh as well. Once again wanting the emeralds for himself, Eggman plans on using them to power his latest creation, the Death Egg, a flying fortress orbiting the planet with the potential to be his greatest weapon. With the desire to rule the world fueling the mad doctor, he prepares to once again engage with his greatest enemy, the one force that could possibly spoil his plans.

"The stage is set. Now it's time for you to bring the curtain to a close on this adventure once and for all!"

Gameplay

Sonic and "Tails" facing off against Dr. Eggman in his redesigned Eggmobile.

Building upon the engine from the first game, Sonic the Hedgehog 2 kept to the same basic formula as the first game: to overcome a series of obstacles and enemies and reach the end of each "Act," all under the span of ten minutes. Many of the elements that made the first Sonic the Hedgehog unique return, such as the loop-de-loops and curved slopes, while introducing new hazards and level elements like the corkscrews in Emerald Hill Zone and the slot machines in Casino Night Zone, placed inside areas taking full advantage of the pinball side of the physics. With the exception of Metropolis Zone (which has three Acts) and the final three Zones of the game (which are one Act each), each Zone only possesses two Acts, although each Act in this game is larger than the Acts found in Sonic the Hedgehog.

The main form of attack for Sonic is the same as the first game, the ever trusty Spin Attack that Sonic curls into each time he jumps. Able to hit enemies from any angle as long as spikes or some other projectile is not in the way, he can also curl into this spin on the ground in the same way, by the player pressing Down on the control pad as he runs along the terrain. However, the game also introduces a new way to gather up speed in this form without having to build it up. The Spin Dash, which has since become a staple of the series, allows Sonic to rev up in a static location before he fires off, either destroying enemies in his wake or giving him the momentum to slide up steep slopes and reach higher areas of each level. By pressing and holding Down while tapping the A, B or C button, letting go of Down allows Sonic to zoom ahead, Dr. Eggman's forces being no match for the blue hedgehog.

Sonic and "Tails" caught up in the Casino Night Zone.

As both the title screen and the story suggest, a new character is introduced in the game. Miles "Tails" Prower, by default, follows Sonic around automatically, emulating each move Sonic does. Sometimes helpful and sometimes baffling, he is also given an infinite number of lives, so if the player is able to just miss a hazard with Sonic but "Tails" is less than fortunate, he will return to the screen, using his namesake to fly from the top of the screen down to where Sonic is standing. He also uses this method to catch up to Sonic if the player is fast enough to lose the two-tailed fox. If a second controller is plugged in, another player can control "Tails," making Sonic the Hedgehog 2 the first game with "1.5 player" play. Although given the flying animation, the other player can not activate "Tails" flying ability, nor can they jump on the various monitors that litter each zone. The infinite lives count, however, remains. In the options menu to the game, having "Tails" follow Sonic can be turned on or off, the game also giving the player the option to play as "Tails" by himself. Though he can now break monitors when alone, he still can not fly, and must follow the same rules of extra lives as Sonic does in the main game.

Special Stages and Chaos Emeralds return in this game, although both how you access them and how you play through them are completely different from the first Sonic the Hedgehog. The only way to activate them is by hitting the checkpoints in this game, which are Star Posts instead of Lamp Posts. If the player possesses fifty Rings while touching the post, a ring of stars will appear for a short time, jumping into them transporting Sonic and "Tails" into the Special Stage. A three-dimensional-esque half pipe that can feel like a roller coaster, the object is to collect the number of Rings the stage announces at the beginning. Each stage is broken up into three parts, and if the player successfully collects Rings for all three tries, they will be awarded with one of the Chaos Emeralds. While the last game only had six, Sonic 2 raises the total by one. And while the Chaos Emeralds are not completely necessary to beat the game in a simple run through, they are still needed to view the true ending of the game. As an added incentive, the team behind the game decided to give the players a bonus for collecting all seven Chaos Emeralds. After finding the seventh, and then collecting yet another fifty Rings in a Zone and jumping up, Sonic will transform into Super Sonic, a golden-hued, buffed out version of the original who is both invincible and super fast. The only downside, though, is the transformation is temporary, and drains Sonic's Ring count, returning to his original true blue self once all the Rings are gone.

Two-player VS mode

The classic two-player mode.

Being the second in the series, the team behind the game decided they would try their hand at a competitive, two-player mode. Taking the Emerald Hill Zone, Casino Night Zone, Mystic Cave Zone from the main game, throwing in the Special Stages, and giving the main levels a unique soundtrack for the mode, each player controls one of the main characters to the game as they traverse a split-screen form of these classic levels. With Sonic on top and "Tails" on the bottom, they are graded on five criteria for each act: Score, Time, Ring count at the end of the Act, Total Ring count (including those lost by being hit), and number of Item Boxes popped open. The player that wins the most out of those five takes the round. Though the standard item boxes from the game are present, there are two that are unique to this mode. The first is a teleportation box, which will switch Sonic and "Tails"' position on the map. The second is an Eggman monitor, that will cause whoever pops it open to take a hit. As every monitor on-screen is only static, it is always random as to what will be found inside each monitor. Also of note is that the extra lives in the item boxes are not determined by which character opens it, but by which character's face shows up, so it is entirely possible for the player being Sonic to give "Tails" an extra life, and vice-versa.

As each Zone only contains two Acts, if a tie occurs it will be decided by the competitors in a Special Stage. As these play different from the rest of the game, the only criteria that is graded is the Ring count at the end of each segment, the stage still split up into three "rounds." The best two out of three takes the Special Stage, and subsequently the Zone. Even if there are no ties during a run through the two player mode, the Special Stage is still one of the four levels to be chosen during the mode, the same rules applying to it as the other Special Stages. The player who wins the most out of everything is, naturally, the winner.

For those who want their two-player encounters to be even crazier, an option is available to change every monitor in the game to a Teleporter monitor.

Items

Sonic2 MD Sprite Monitors.png
Super Ring
Awards 10 Rings.
Sonic2 MD Sprite Monitors.png
Shield
Gives the player a shield that protects them from damage for one hit.
Sonic2 MD Sprite Monitors.png
Power Sneakers
Increases the player's speed for a short time.
Sonic2 MD Sprite Monitors.png
Invincible
Makes the player invincible for a short time.
Sonic2 MD Sprite Monitors.png
One-Up
Awards an extra life.
Sonic2 MD Sprite Monitors.png
Teleporter
Makes both Sonic and Tails change places in the Act. Appears only in the two-player VS mode.
Sonic2 MD Sprite Monitors.png
Eggman Mark
Causes damage to the player when broken, taking away Shields, Rings and lives. Appears only in the two-player VS mode.
Sonic2 MD Sprite Monitors.png
?
Contains a random item that is revealed when broken. Appears only in the two-player VS mode, replacing all monitors.

Scoring

Hitting Bumpers: 10 points each for the first ten hits on any given bumper; after that no more points can be gained from that bumper.

Enemy Chains:

  • First Enemy = 100
  • Second Enemy = 200
  • Third Enemy = 500
  • Fourth through Fifteenth Enemies = 1,000 each
  • 16th and all Subsequent Enemies = 10,000 each

(A chain refers to all enemies destroyed until the next time Sonic lands on some form of ground, or releases from a Spin Dash)

Dr. Eggman Boss: 1,000 points each.

End Level Ring Bonus: 100 points for each Ring held.

End Level Perfect Bonus: The game stores a list of how many Rings are present in each level. Each time you get a lone Ring, the game subtracts one from this value. If this value is 0 when you pass the end signpost, you receive a 50,000 point bonus. Super Ring boxes and those placed by edit mode do not affect this counter. Getting hit by an enemy and losing your current Rings does not reset the counter.

End Level Time Bonus:

  • 0:29 or less = 50,000
  • 0:30 to 0:44 = 10,000
  • 0:45 to 0:59 = 5,000
  • 1:00 to 1:29 = 4,000
  • 1:30 to 1:59 = 3,000
  • 2:00 to 2:59 = 2,000
  • 3:00 to 3:59 = 1,000
  • 4:00 to 4:59 = 500
  • 5:00 or more = 0

Special Stage:

  • Rings = 100 points for each Ring held.
  • Chaos Emerald = 10,000 points.
  • Perfect Bonus = 50,000 points if every Ring was collected.

Special Scoring in Casino Night Zone:

  • There are certain slots which aren't connected to Slot Machine Reels. Upon entering the slot from above, you receive 8 sequential 100 point additions to your score. (At one point in act 2, there are five such slots placed directly above one another, so landing in one triggers the rest in sequence for 4000 points.)
  • There are also green, yellow, and red bumpers in sets of three. Hitting one is worth 10 points and causes the bumper to change color (green -> yellow -> red -> disappear). Destroying the third red bumper in each set of 3 is worth 500 points instead of 10.

Music and sound

Sound test

The sound test in Sonic the Hedgehog 2.

Below is a listing of the songs available to play through the game's sound test, accessible through the Options menu.

History

Sales data

Copies sold Date Platform(s) Regions Cumulative sales References Notes
400,000 1993-03-04
Sega Mega Drive
JP 400,000 [24] This figure was what Sega officially stated at the time. Sega Force, however, cited inside sources that claimed the game had only sold about half that number by that point.
5,600,000 2006-06
Sega Mega Drive
WW 6,000,000 [25][26][27] Sonic: A Very Quick History claims that Sonic 2 sold nearly 500,000 units worldwide in its first 5 days on sale. The final number makes Sonic 2 the second best-selling game for the Sega Mega Drive/Genesis overall (second only to its predecessor), as well as the the best-selling game for the console when discounting sales of games bundled with hardware.

Versions

REV01

  1. The game waits until the DMA is completed.
  2. Fixes a typo with the name "THOMAS KALINSKE".
  3. Remove unused camera code.
  4. Fixes a bug where the ring monitor ignores the 999 ring cap.
  5. Fixes a bug in 2 player mode where the mappings are broken Sonic and Tails are swapped by making them invisible.
  6. Tries to fix a crash by placing an object in debug but it doesn't work.
  7. Removes useless "BuildSprites" code.
  8. Strangely this revision adds a "nop" before the Ring Manager.
  9. Different object positions in this build.
  10. Changed a branch to "Obj02_ResetLevel_Part3".
  11. Invisible Solid Blocks are strangely no longer visible in debug.
  12. Invisible MTZ plates are strangely no longer visible in debug.
  13. Fixes a bug where the player can bounce off MTZ plates while hurt or dead.
  14. Game now checks if the player is hurt in "Obj85"
  15. Changed some duplicate PLC entries.
  16. Intersting 2 bugs are exclusive to this version.

REV02 (Sonic Classics)

Note: This will only apply to the game specifically.

REV02 released as a part of Sonic Classics contains all of the changes from REV01 and Some more.

  1. Removes a bunch of JmpTo commands improving performance.
  2. Some add/sub commands are optimized to addq/subq.
  3. Some instructions now use pc-relative addressing, instead of absolute long.
  4. Removed a bunch of (useless) nop commands
  5. Fixes a bug where the WFZ background doesn't stop scrolling up after you get a time over during the cutscene.
  6. Removed some unused background scrolling code.
  7. Fixes a bug where Sonic can transform at the end of the level. (signpost only)
  8. The game waits until the DMA is completed.
  9. Fixes a typo with the name "THOMAS KALINSKE".
  10. Remove unused camera code.
  11. Fixes a bug where the ring monitor ignores the 999 ring cap.
  12. Fixes a bug in 2 player mode where the mappings are broken Sonic and Tails are swapped by making them invisible.
  13. Tries to fix a crash by placing an object in debug but it doesn't work.
  14. Removes useless "BuildSprites" code.
  15. Different object positions in this build.
  16. Removed a branch to "Obj02_ResetLevel_Part3".
  17. Invisible Solid Blocks are strangely no longer visible in debug.
  18. Invisible MTZ plates are strangely no longer visible in debug.
  19. Fixes a bug where the player can bounce off MTZ plates while hurt or dead.
  20. Game now checks if the player is hurt in "Obj85"
  21. Changed some duplicate PLC entries.

Comparisons

Sonic Retro emblem.svg Main article: Sonic the Hedgehog 2 (16-bit)/Comparisons

Rereleases and ports

Production credits

Sonic Retro emblem.svg Main article: sega:Sonic the Hedgehog 2 (Mega Drive)/Production credits

Patents

Manuals

Sonic Retro emblem.svg Main article: Sonic the Hedgehog 2 (16-bit)/Manuals

Magazine articles

Sonic Retro emblem.svg Main article: sega:Sonic the Hedgehog 2 (Mega Drive)/Magazine articles

Promotional material

Sonic Retro emblem.svg Main article: Sonic the Hedgehog 2 (16-bit)/Promotional material

Artwork

Physical scans




Sega Mega Drive
92 Sonic Retro Average
Based on 5 reviews
Publication Score Source
Famitsu (JP) 78
Game Informer (US) 95 [28]
MegaTech (UK) 95 [29]
Sega Pro (UK) 94 [30]
Svenska Hemdatornytt (SE) 100 [31][32]
Mega Drive, JP
Sonic2 box jap.jpg
Cover
Mega Drive, US
Sonic2 box us.jpg
Cover
Mega Drive, US (Cardboard)
Sonic 2 Sega Genesis US Cardboard Cover.jpg
Cover
Mega Drive, US (Not for resale)
Sonic2 md nfr.jpg
Cover
SonicHedgehog2cart.jpg
Cart
Mega Drive, EU (Made in Japan)
Sonic2 MD EU Box MadeInJapan.jpg
Cover
Sonic2 MD EU pcb.jpg
PCB
Mega Drive, EU (Made in China)
Sonic2 box eu.jpg
Cover
Mega Drive, EU (Made in Malaysia)
Sonic2 MD EU mim cover.jpg
Cover
Mega Drive, EU (Pack-in)
Sonic2 MD EU packin cover.jpg
Cover
Mega Drive, UK
Sonic2 MD UK cover.jpg
Cover
Mega Drive, FR (Blister pack)
Sonic2 MD FR blister back.jpgSonic2 MD FR blister front.jpg
Cover
Mega Drive, PT
Sonic2 MD PT cover.jpg
Cover
Mega Drive, PT (Colour manual)

S2-md-eu-cart.jpg
Cart
Sonic2 MD PTC cover.jpg
Manual
Mega Drive, SE (Hent Rent)
Sonic2red box se.jpg
Cover
S2-md-eu-cart.jpg
Cart
Mega Drive, SE (Hent Rent) (alt)
Sonic2blue box se.jpg
Cover
S2-md-eu-cart.jpg
Cart
Mega Drive, GR (Zegetron)
Sonic2 MD box GK.jpg
Cover
S2-md-eu-cart.jpg
Cart
Mega Drive, CZ (Datart)
Sonic2 MD CZ Box.jpg
Cover
S2-md-eu-cart.jpg
Cart
Notavailable.svg
Manual
Mega Drive, AU
Sonic2 md au cover.jpg
Cover
Mega Drive, AU (alt)
Sonic2 MD AU alt cover.jpg
Cover
Mega Drive, BR/AR/UY
Sonic2 md br cover.jpg
Cover
Mega Drive, BR (alt)
Sonic2 md br cover alt2.jpg
Cover
Mega Drive, BR (newer)
Sonic2 md br cover alt.jpg
Cover
Mega Drive, KR
Sonic2 MD KR cover.jpg
Cover
Sonic2 MD KR cart.jpg
Cart
Mega Drive, Asia
Sonic2 md asia cover.jpg
Cover
Mega Drive, Asia (alt)

Sonic2 MD AS alt cart.jpg
Cart
Mega Drive, RU/CIS (Buka)[33]

S2-md-eu-cart.jpg
Cart
Buka RU Manual Universal.png
Manual
Mega Drive, CA
Sonic2 MD CA cover.jpg
Cover
Mega Drive, CA (Not for resale)
Sonic2 MD CA cover.jpg
Cover
SonicHedgehog2cart.jpg
Cart
Mega Drive, ZA
Sonic2 MD box ZA.jpg
Cover
S2-md-eu-cart.jpg
Cart

Technical information

ROM dump status

System Hash Size Build Date Source Comments
Sega Mega Drive
CRC32 24ab4c3a
MD5 8e2c29a1e65111fe2078359e685e7943
SHA-1 14dd06fc3aa19a59a818ea1f6de150c9061b14d4
1MB 1992-09-26 Cartridge[34] v00
Sega Mega Drive
CRC32 7b905383
MD5 9feeb724052c39982d432a7851c98d3e
SHA-1 8bca5dcef1af3e00098666fd892dc1c2a76333f9
1MB 1992-09-29 Cartridge v01
Sega Mega Drive
CRC32 39faaa70
MD5 a460bf633579a80eebbc09d6809e1b09
SHA-1 5b51b4d98cb4a7a38157dc4ab9462164dd224bfd
1MB 1991-04 Cartridge[35] Nick Arcade prototype Download.svg (519 kB) (info) Page
Sega Mega Drive
CRC32 eea21b5c
MD5 51c1eee9dd79db9ef0d8b0aa36957b16
SHA-1 2f3228088b000260c2e00961efb0ed76629c84e9
1MB 1991-04 Cartridge Simon Wai prototype Download.svg (625 kB) (info) Page
Sega Mega Drive
CRC32 370b3ce5
MD5 4f779c3e0ee0bd0686aab8f9e16a4002
SHA-1 c337d2f11a0630d61fc3c4f95d6e7970bb1f7910
1MB 1992-08-21 EPROMs[36] Alpha Download.svg (629 kB) (info) Page
Sega Mega Drive
CRC32 0be8afa7
MD5 ef4148440b61bf101286f9e410da2740
SHA-1 24d6451a1ac72837cc2d88b93138677b5d043ae6
1MB 1992-09-14 EPROMs[37] Pre-beta Download.svg (695 kB) (info) Page
Sega Mega Drive
 ?
CRC32 5667eced
MD5 f90f777f544720d9c76986212ae70ea1
SHA-1 9bebfb78049e7556fbef30f4a43d204fbf4c64f0
1MB 1991-04 Cartridge CENSOR prototype Download.svg (701 kB) (info) Page
Sega Mega Drive
CRC32 8fda5cc5
MD5 87dfce45e665fa34104067cae1a74d5e
SHA-1 66ec1392f13a6e8ed8d0837492ca32daad769900
1MB 1992-09-18 CD-R disc[38] Beta 4 Download.svg (713 kB) (info) Page
Sega Mega Drive
CRC32 066b9a89
MD5 df7d6c4fa1899d45405654b1250b4330
SHA-1 b60f424e77be28ffa6937de3a08256ca55e6fe40
1MB 1992-09-21 CD-R disc[39] Beta 5 Download.svg (727 kB) (info) Page
Sega Mega Drive
CRC32 cebc64e0
MD5 7640c831369b8c8f52880b3fe5506bbf
SHA-1 21dfc1142809622d5548e83f2c3544c34e0b2320
1MB 1992-09-22 CD-R disc[40] Beta 6 (first build) Download.svg (730 kB) (info) Page
Sega Mega Drive
CRC32 cb036e6c
MD5 0ad4b54b426eb0b0d0360d0453233a0a
SHA-1 c9fdce433de4661e5f6f276a9b8c1b2b139b6709
1MB 1992-09-22 CD-R disc[41] Beta 6 (second build) Download.svg (730 kB) (info) Page
Sega Mega Drive
CRC32 dc7be12c
MD5 d39416089539e379f4c8ee7900f636b8
SHA-1 14c6ec07bcc1450d7ed3afcc9994c7d994a9b52d
1MB 1992-09-24 CD-R disc[42] Beta 7 Download.svg (730 kB) (info) Page
Sega Mega Drive
CRC32 6089fadd
MD5 0cc77d8f87bc9e6dc990bbe126b4701e
SHA-1 5f2dce167d03566d356dbdbcdd38b1b1dfb56b09
1MB 1992-09-24 CD-R disc[43] Beta 8 Download.svg (732 kB) (info) Page
Sega Mega Drive
CRC32 f23ad4b3
MD5 da75878c193293c2e0801a61ea4ce8c0
SHA-1 2af1003247aec262089c8df22d05e80d04a1b5e4
1MB 1992-09 Sonic Compilation Hack; extracted from Sonic Compilation. Assumed to be v02.

ROM hacking


Hacking Guides

See also

External links


References

  1. File:Sonic2 box jap.jpg
  2. 2.0 2.1 https://sega.jp/history/hard/megadrive/software.html (Wayback Machine: 2020-07-20 09:51)
  3. [gamepro, issue 42, page 51 gamepro, issue 42, page 51]
  4. [vgce, issue 47, page 69 vgce, issue 47, page 69]
  5. [mms, issue 2, page 60 mms, issue 2, page 60]
  6. https://trove.nla.gov.au/newspaper/article/126960710?searchTerm=sonic%20the%20hedgehog (Wayback Machine: 2023-07-09 06:59)
  7. [segamagazin, issue 1, page 71 segamagazin, issue 1, page 71]
  8. https://www.nintendo.co.jp/wii/vc/software/03.html (Wayback Machine: 2018-03-06 00:26)
  9. http://vc.sega.jp:80/vc_sonic2/ (Wayback Machine: 2007-06-20 09:53)
  10. 10.0 10.1 http://www.nintendo.com/games/detail/Ep8oLkJXWlgKpLFfuEve8Gb_qEWumasV (Wayback Machine: 2010-11-23 02:20)
  11. 11.0 11.1 http://www.nintendolife.com:80/games/megadrive/sonic_the_hedgehog_2 (Wayback Machine: 2017-09-09 22:02)
  12. https://www.nintendo.co.uk/Games/Virtual-Console-Wii-/Sonic-the-Hedgehog-2-279118.html (archive.today)
  13. http://www.nintendo.com.au/index.php?action=catalogue&prodcat_id=41&prod_id=19771&pageID=4 (Wayback Machine: 2012-03-28 00:58)
  14. https://store-jp.nintendo.com/list/software/70010000046986.html (Wayback Machine: 2021-10-26 03:04)
  15. @NintendoAmerica on Twitter (archive.today)
  16. @NintendoEurope on Twitter (archive.today)
  17. @NintendoUK on Twitter (archive.today)
  18. @NintendoAUNZ on Twitter (archive.today)
  19. http://games.real.com/allgames.php?mode=spnav (Wayback Machine: 2004-08-02 23:32)
  20. 20.0 20.1 20.2 20.3 20.4 https://steamdb.info/app/71163/ (Wayback Machine: 2019-11-16 23:27)
  21. 21.0 21.1 21.2 21.3 21.4 http://steamdb.info/app/71163/ (Wayback Machine: 2013-05-22 19:33)
  22. 22.0 22.1 22.2 22.3 22.4 22.5 22.6 22.7 22.8 22.9 https://steamdb.info/app/71163/history/?changeid=5749251
  23. 23.0 23.1 23.2 23.3 23.4 23.5 23.6 23.7 23.8 23.9 http://steamdb.info/app/71163/ (Wayback Machine: 2019-11-16 23:27)
  24. "Sega officially claims to have sold 400,000 units. However, inside sources claim sales have been about half that level.", File:SegaForce_UK_16.pdf, page 12
  25. https://www.gamedeveloper.com/business/a-detailed-cross-examination-of-yesterday-and-today-s-best-selling-platform-games (archive.today)
  26. "It sells almost a half-million units in the first 5 days - very impressive for that era. It goes on to sell 6 million.", https://youtube.com/watch?v=7mFs2v7XM4o&t=193s (Ghostarchive)
  27. "It sells almost a half-million units in the first 5 days - very impressive for that era. It goes on to sell 6 million.", https://youtube.com/watch?v=f-ij_RcEzcI&t=873s (Ghostarchive)
  28. [gi, issue 109, page 104 gi, issue 109, page 104]
  29. [megatech, issue 11s, page 8 megatech, issue 11s, page 8]
  30. [segapro, issue 14, page segapro, issue 14, page]
  31. [shn, issue 1993-01, page 37 shn, issue 1993-01, page 37]
  32. http://amr.abime.net/review_50932 (Wayback Machine: 2014-11-29 02:29)
  33. File:Buka Price list 1997-06-30 RU.pdf, page 6
  34. https://forums.sonicretro.org/index.php?showtopic=5030&view=findpost&p=81642
  35. Hidden Palace: Sonic the Hedgehog 2 (Nick Arcade prototype)
  36. Hidden Palace: Sonic the Hedgehog 2 (Aug 21, 1992 prototype)
  37. Hidden Palace: Sonic the Hedgehog 2 (Sep 14, 1992 prototype)
  38. Hidden Palace: Sonic the Hedgehog 2 (Sep 18, 1992 prototype - Beta 4)
  39. Hidden Palace: Sonic the Hedgehog 2 (Sep 21, 1992 prototype - Beta 5)
  40. Hidden Palace: Sonic the Hedgehog 2 (Sep 22, 1992 prototype - Beta 6)
  41. Hidden Palace: Sonic the Hedgehog 2 (Sep 22, 1992 prototype - Beta 6 - B)
  42. Hidden Palace: Sonic the Hedgehog 2 (Sep 24, 1992 prototype - Beta 7)
  43. Hidden Palace: Sonic the Hedgehog 2 (Sep 24, 1992 prototype - Beta 8)


Sonic the Hedgehog 2 (16-bit)
Sonic2 title.png

Main page (KiS2|2013|3D|Ages)
Comparisons (KiS2) (2013)
Maps (KiS2) (2013)
Achievements
Credits


Manuals
Promotional material
Magazine articles
Video coverage
Reception
Merchandise


Development
Hidden content (KiS2) (2013)
Bugs (KiS2) (2013)
Region coding
Hacking guide
Bootlegs

Sonic the Hedgehog games for the following systems
Sega Mega Drive

Sega Mega-CD
Sega 32X
 1991  Sonic the Hedgehog | Sonic Eraser     1992  Sonic the Hedgehog 2     1993  Sonic the Hedgehog CD | Dr. Robotnik's Mean Bean Machine | Sonic Spinball     1994  Sonic the Hedgehog 3 | Sonic & Knuckles     1995  Chaotix | Sonic Classics     1996  Sonic 3D: Flickies' Island    
Wii Virtual Console
WiiWare
 2006  Sonic the Hedgehog | Dr. Robotnik's Mean Bean Machine     2007  Sonic the Hedgehog 2 | Sonic the Hedgehog 3 | Sonic Spinball | Sonic 3D: Flickies' Island     2008  Sonic the Hedgehog (8-bit) | Sonic the Hedgehog 2 (8-bit)     2009  Sonic Chaos | Sonic & Knuckles     2010  Sonic the Hedgehog 4 Episode I    
filler
Steam
 2010  Sonic the Hedgehog | Sonic Spinball | Dr. Robotnik's Mean Bean Machine | Sonic 3D: Flickies' Island | Sonic & Sega All-Stars Racing     2011  Sonic the Hedgehog 2 | Sonic the Hedgehog 3 & Knuckles | Sonic Adventure | Sonic Generations     2012  Sonic the Hedgehog 4 Episode I | Sonic the Hedgehog CD | Sonic the Hedgehog 4 Episode II | Sonic Adventure 2     2013  Sonic & All-Stars Racing Transformed     2015  Sonic Lost World     2017  Sonic Mania | Sonic Forces     2019  Team Sonic Racing     2022  Sonic Origins | Sonic Frontiers     2023  Sonic Colours: Ultimate | The Murder of Sonic the Hedgehog | Sonic Superstars     2024  Sonic X Shadow Generations    
Mac OS X

Mac App Store
Steam OS X
 2013  Sonic & Sega All-Stars Racing     2019  Sonic the Hedgehog | Sonic the Hedgehog 2 | Sonic Spinball | Sonic 3D: Flickies' Island | Dr. Robotnik's Mean Bean Machine | Sonic Racing     2022  Sonic Speed Simulator     2023  The Murder of Sonic the Hedgehog | Sonic Dream Team    
filler
iOS
 2007  Sonic the Hedgehog (iPod)     2009  Sonic the Hedgehog (iPhone)     2010  Sonic the Hedgehog 2 | Sonic Spinball | Sonic at the Olympic Winter Games | Sonic the Hedgehog 4 Episode I | Sonic Comics     2011  Sonic 20th Anniversary | Sonic the Sketchhog | Sonic & Sega All-Stars Racing | Sonic the Hedgehog CD     2012  Sonic the Hedgehog 4 Episode II | Sonic the Hedgehog Skins | Sonic Jump     2013  Sonic Dash | Sonic the Hedgehog | Sonic the Hedgehog 2 | Sonic & All-Stars Racing Transformed     2014  Sonic Jump Fever     2015  Sonic Runners | Sonic Dash 2: Sonic Boom     2017  Sonic Forces: Speed Battle | Sonic Runners Adventure     2019  Sonic Racing     2020  Sonic at the Olympic Games     2022  Sonic Speed Simulator     2023  Sonic Prime Dash | Sonic Dream Team    
 Unreleased  Sonic Central | Sonic Demo
Google Android OS
 2011  Sonic the Hedgehog | Sonic Advance | Sonic the Hedgehog CD     2012  Sonic the Hedgehog 4 Episode I | Sonic the Hedgehog 4 Episode II | Sonic Jump     2013  Sonic the Hedgehog | Happy Sonic! Live Wallpaper | Sonic & Sega All-Stars Racing | Sonic the Hedgehog 2 | Sonic Dash | Sonic & All-Stars Racing Transformed     2014  Sonic Jump Fever     2015  Sonic Runners | Sonic Dash 2: Sonic Boom     2017  Sonic Runners Adventure | Sonic Forces: Speed Battle     2020  Sonic at the Olympic Games     2022  Sonic Speed Simulator     2023  Sonic Prime Dash    
 Unreleased  Sonic Central | Sonic Demo