Sonic the Hedgehog (Mega Drive)

"Sonic 1" redirects here. For the Sega Master System and Sega Game Gear versions, see Sonic the Hedgehog (8-bit). For the 2013 remake, see Sonic the Hedgehog (2013).

n/a

Sonic the Hedgehog

System(s): Sega Mega Drive, Virtual Console, Steam, RealOne Arcade, iOS, Android

Publisher: Sega

Developer:

Sega R&D 9 (Sonic Team)^[1]

M2^[2]

Backbone Entertainment

Ziggurat Interactive

Smashing Studios

Distributor:

Ecofilmes (PT)

Tec Toy (BR)

Sound driver: SMPS 68000 (modified) (Sonic the Hedgehog)

Genre: Action^[3]^[4]

Number of players: 1

Release	Date	RRP	Code
JP	1991-07-26^[5]^[4]	¥6,0006,000	G-4049
US	1991-06	$54.9554.95^[6]	1009
US (Classic)	1993		1009C
US (Classic; ESRB)	1995		1009
EU	1991-06		1009
BX	199x
FR	199x
PT	1991		MDJ1009
UK	1991-07^[7]	£34.9934.99^[8]^[9]	1009
LT	199x
SE (Rental)	199x
GR	199x
CZ	199x
AU	199x		FSON00SMC
CA	199x
BR	1991-09^[10]
BR (Red)	199x
KR	199x		GM4015JG
AS	199x
ZA	199x
IN	199x
JP	199x	¥?	?
UK	199x	£?	?

JP ▼	2006-12-02^[12]	600pts600^[5]
US ▼	2006-11-19^[11]	800pts800^[11]
EU ▼	2006-12-08^[13]	800pts800^[13]
AU ▼	2006-12-07	800pts800^[14]
JP ▼	2009-05-20^[19]	¥667 (700)700i^[19]		4+
US ▼	2009-05-20^[15]	$5.995.99^[16]		4+
EU ▼	2009-05-20^[17]			4+
UK ▼	2009-05-20^[18]			4+
JP ▼ (iPod)	2007-12-19^[19]	¥571 (600)600i^[19]
US ▼ (iPod)	2007-12-18
US ▼	2002-11-14^[20]
US ▼	2010-10-26^[21]	$4.994.99^[22]	71113
EU ▼	2010-10-26^[21]	€4.494.49^[22]	71113
DE ▼	2010-10-26^[21]	€4.494.49^[22]	71113
UK ▼	2010-10-26^[21]	£3.993.99^[22]	71113
AU ▼	2010-10-26^[21]	$6.996.99^[22]	71113
US ▼	2019-01-31^[23]	$4.994.99^[24]	71113
EU ▼	2019-01-31^[23]	€4.494.49^[24]	71113
DE ▼	2019-01-31^[23]	€4.494.49^[24]	71113
UK ▼	2019-01-31^[23]	£3.993.99^[24]	71113
AU ▼	2019-01-31^[23]	$5.995.99^[24]	71113
US ▼	2019-01-31^[23]	$4.994.99^[24]	71113
EU ▼	2019-01-31^[23]	€4.494.49^[24]	71113
DE ▼	2019-01-31^[23]	€4.494.49^[24]	71113
UK ▼	2019-01-31^[23]	£3.993.99^[24]	71113
AU ▼	2019-01-31^[23]	$5.995.99^[24]	71113
JP ▼	2011-01-11^[25]	¥667 (700)700i^[26]

Visit Sonic the Hedgehog (16-bit) on Sonic Retro for the full article.

Visit Sonic the Hedgehog (arcade game) on Sonic Retro for the full article.

Visit Sonic the Hedgehog (iPod) on Sonic Retro for the full article.

Visit Sonic the Hedgehog (iPhone) on Sonic Retro for the full article.

Visit Sonic the Hedgehog (Android) on Sonic Retro for the full article.

Production credits

Main article: Sonic the Hedgehog (Mega Drive)/Production credits.

Magazine articles

Sega Retro Average

Publication

Version

Score

1700 igr dlya Sega (RU)

70

^[27]

ACE (UK)

93

^[28]

ACE (UK)

100

^[29]

Ação Games (BR)

100

^[10]

Beep! MegaDrive (JP)

NTSC-J

93

^[30]

Cool Gamer (RU)

80

^[31]

Computer & Video Games (UK)

94

^[32]

Computer + Video Giochi (IT)

96

^[33]

Electronic Gaming Monthly (US)

NTSC-U

90

^[34]

Entsiklopediya luchshikh igr Sega. Vypusk 1 (RU)

70

^[35]

Excalibur (CZ)

75

^[36]

GamePro (US)

NTSC-U

96

^[37]

The Games Machine (IT)

98

^[38]

Games-X (UK)

100

^[39]

HiScore (DK)

PAL

80

^[40]

Hobby Consolas (ES)

95

^[41]

Joystick (FR)

98

^[42]

Sega Mega Drive Advanced Gaming (UK)

85

^[43]

Mega Action (UK)

93

^[44]

Mega Action (UK)

87

^[45]

Megablast (DE)

83

^[46]

Mega Play (US)

88

^[47]

MegaTech (UK)

88

^[48]

MegaTech (UK)

PAL

89

^[49]

Micromanía (segunda época) (ES)

85

^[50]

Mean Machines (UK)

92

^[51]

Mean Machines Sega (UK)

76

^[52]

Megazone (AU)

92

^[53]

Player One (FR)

96

^[54]

Raze (UK)

95

^[55]

Secret Service (PL)

90

^[56]

Sega Power (UK)

97

^[57]

Sega Pro (UK)

96

^[58]

Sega Pro (UK)

94

^[59]

Sega Pro (UK)

90

^[60]

Sega Saturn Magazine (JP)

NTSC-J

85

^[61]

Tilt (FR)

95

^[62]

Tilt (FR)

95

^[63]

Tricks 16 bit (RU)

80

^[64]

Video Game (BR)

100

^[65]

VideoGames & Computer Entertainment (US)

90

^[6]

Video Games (DE)

82

^[66]

Zero (UK)

95

^[67]

	90
Based on 43 reviews

Sonic the Hedgehog (Mega Drive)

Main article: Sonic the Hedgehog (Mega Drive)/Magazine articles.

Technical information

Main article: Sonic the Hedgehog (Mega Drive)/Technical information.

ROM dump status

System

Hash

Size

Build Date

Source

Comments

✔

CRC32	f9394e97
MD5	1bc674be034e43c96b86487ac69d9293
SHA-1	6ddb7de1e17e7f6cdb88927bd906352030daa194

512kB

1991-04

Cartridge (US/EU)

Revision 00

✔

CRC32	afe05eee
MD5	09dadb5071eb35050067a32462e39c5f
SHA-1	69e102855d4389c3fd1a8f3dc7d193f8eee5fe5b

512kB

1991-04

Cartridge (EU/JP/KR)

Revision 01

✔

CRC32	6382b2c5
MD5	c6c15aea60bda10ae11c6bc375296153
SHA-1	95b6aac7e11bb2d908aafa06973ffeb45817a992

512kB

1991-04

Sonic Mega Collection disc

JP2

?

CRC32	917c9ca9
MD5	b06578c3412de1c5be765a59dec5ff1f
SHA-1	0b38a66d5e2ffa2394fccb41e4871419cd0a077d

512kB

1989-01

EPROM cartridge^[68]

Page

?

CRC32	7a093f0b
MD5	e5e4eea000240b7bc675cf148b5b897b
SHA-1	ad7502fa15b1819eeb4089783b4a850d898bc71e

512kB

1991-04

Cartridge (pirate)

Sonic The Hedgehog (W) (REV00) [p5][!].bin

?

CRC32	2ad86af1
MD5	0b5cc06bcce7f2b7907b7357266bbfa7
SHA-1	a56c2f98d891eb6aa69c8169d806acf996325810

512kB

1991-04

Cartridge (pirate)

Sonic The Hedgehog (W) (REV00) [p4][!].bin

?

CRC32	964e15de
MD5	fced4cdb489c59300ae1b1330ff265cb
SHA-1	6a90e740a96d413d8bc01e9b6fbe990316a93380

512kB

1991-04

Cartridge (pirate)

Sonic The Hedgehog (W) (REV00) [p3][!].bin

?

CRC32	5ce8f5cf
MD5	0ec2d91d212bb486f6d7e80cf7767fa5
SHA-1	d1f80dbf4083273b7de427ca50b69399d5b7e6d8

512kB

1991-04

Cartridge (pirate)

Sonic The Hedgehog (W) (REV00) [p2][!].bin

?

CRC32	0d770284
MD5	4dc697b98100a9ba6b8d99d9b471ea74
SHA-1	4c3b606bec697b0b934ba2f650a8b83c0e3b77c7

512kB

1991-04

Cartridge (pirate)

Sonic The Hedgehog (W) (REV00) [p1][!].bin

References

↑ @U1_Toyama on Twitter (archive.today)
↑ https://www.mtwo.co.jp/development/retrogame-2/#tab-1
↑ File:Sonic1 box jap.jpg
↑ ^4.0 ^4.1 https://sega.jp/history/hard/megadrive/software.html (Wayback Machine: 2020-07-20 09:51)
↑ ^5.0 ^5.1 http://vc.sega.jp:80/vc_sonic/ (Wayback Machine: 2007-02-09 19:24)
↑ ^6.0 ^6.1 VideoGames & Computer Entertainment, "June 1991" (US; 1991-0x-xx), page 32
↑ Mean Machines, "July 1991" (UK; 1991-06-29), page 44
↑ Raze, "September 1991" (UK; 1991-07-25), page 76
↑ Sega Power, "September 1991" (UK; 1991-08-01), page 11
↑ ^10.0 ^10.1 Ação Games, "Agosto 1991" (BR; 1991-08-xx), page 22
↑ ^11.0 ^11.1 http://www.nintendo.com/games/detail/KxiDSMn_ADYC1Vd30TP-FW3yf8Byxwwu (Wayback Machine: 2010-11-22 22:19)
↑ https://www.nintendo.co.jp/wii/vc/software/01.html (Wayback Machine: 2017-11-23 05:03)
↑ ^13.0 ^13.1 http://www.nintendolife.com/games/megadrive/sonic_the_hedgehog (Wayback Machine: 2018-03-08 00:20)
↑ http://www.nintendo.com.au/index.php?action=catalogue&prodcat_id=41&prod_id=19772&pageID=4 (Wayback Machine: 2012-03-28 00:58)
↑ https://itunes.apple.com/us/app/sonic-the-hedgehog/id316025912?mt=8 (Wayback Machine: 2018-09-21 22:24)
↑ http://blogs.sega.com/2010/08/26/segas-back-to-school-iphone-sale/ (Wayback Machine: 2017-11-25 19:32)
↑ https://itunes.apple.com/fr/app/sonic-the-hedgehog/id316050001?mt=8 (Wayback Machine: 2018-09-21 22:40)
↑ https://itunes.apple.com/gb/app/sonic-the-hedgehog/id316050001?mt=8 (Wayback Machine: 2018-05-11 01:38)
↑ ^19.0 ^19.1 ^19.2 ^19.3 http://sega.jp/kt/apple/sonic (Wayback Machine: 2009-12-22 09:21)
↑ http://games.real.com/allgames.php?mode=spnav (Wayback Machine: 2004-08-02 23:32)
↑ ^21.0 ^21.1 ^21.2 ^21.3 ^21.4 https://steamdb.info/app/71113/ (Wayback Machine: 2019-11-16 22:42)
↑ ^22.0 ^22.1 ^22.2 ^22.3 ^22.4 http://steamdb.info/app/71113/ (Wayback Machine: 2013-05-22 20:19)
↑ ^23.0 ^23.1 ^23.2 ^23.3 ^23.4 ^23.5 ^23.6 ^23.7 ^23.8 ^23.9 https://steamdb.info/app/71113/history/?changeid=5749722
↑ ^24.0 ^24.1 ^24.2 ^24.3 ^24.4 ^24.5 ^24.6 ^24.7 ^24.8 ^24.9 http://steamdb.info/app/71113/ (Wayback Machine: 2019-11-16 22:42)
↑ http://blog.sonic-channel.jp/archives/51661784.html (Wayback Machine: 2016-04-29 12:48)
↑ http://sega.jp/kt/google/sonic/ (Wayback Machine: 2011-01-21 10:32)
↑ 1700 igr dlya Sega, "" (RU; 2001-xx-xx), page 215
↑ ACE, "August 1991" (UK; 1991-07-08), page 54
↑ ACE, "November 1991" (UK; 1991-10-08), page 128
↑ Beep! MegaDrive, "August 1991" (JP; 1991-07-08), page 35
↑ Cool Gamer, "9" (RU; 2002-10-13), page 193
↑ Computer & Video Games, "August 1991" (UK; 1991-07-15), page 16
↑ Computer + Video Giochi, "Settembre 1991" (IT; 1991-xx-xx), page 48
↑ Electronic Gaming Monthly, "July 1991" (US; 1991-xx-xx), page 24
↑ Entsiklopediya luchshikh igr Sega. Vypusk 1, "" (RU; 1999-xx-xx), page 359
↑ Excalibur, "" (CZ; 1993-04-10), page 31
↑ GamePro, "June 1991" (US; 1991-xx-xx), page 44
↑ The Games Machine, "Settembre 1991" (IT; 1991-0x-xx), page 85
↑ Games-X, "27th June-3rd July 1991" (UK; 1991-06-27), page 14
↑ HiScore, "15 Juli - 15 September" (DK; 1993-07-15), page 18
↑ Hobby Consolas, "Octubre 1991" (ES; 1991-xx-xx), page 18
↑ Joystick, "Juillet/Août 1991" (FR; 1991-0x-xx), page 164
↑ Sega Mega Drive Advanced Gaming, "October 1992" (UK; 1992-xx-xx), page 79
↑ Mega Action, "June 1993" (UK; 1993-05-20), page 65
↑ Mega Action, "March 1994" (UK; 1994-02-24), page 80
↑ Megablast, "Joker Extra Nr. 1" (DE; 1992-11-04), page 44
↑ Mega Play, "July/August 1991" (US; 1991-0x-xx), page 62
↑ MegaTech, "Xmas 1991" (UK; 1991-12-06), page 48
↑ MegaTech, "June 1992" (UK; 1992-05-20), page 27
↑ Micromanía (segunda época), "Octubre 1991" (ES; 1991-xx-xx), page 34
↑ Mean Machines, "July 1991" (UK; 1991-06-29), page 42
↑ Mean Machines Sega, "August 1993" (UK; 1993-06-30), page 108
↑ Megazone, "August/September 1991" (AU; 1991-xx-xx), page 22
↑ Player One, "Juillet/Août 1991" (FR; 1991-xx-xx), page 26
↑ Raze, "September 1991" (UK; 1991-07-25), page 34
↑ Secret Service, "Październik 1996" (PL; 1996-10-01), page 72
↑ Sega Power, "September 1991" (UK; 1991-08-01), page 9
↑ Sega Pro, "April 1992" (UK; 1992-03-19), page 28
↑ Sega Pro, "Christmas 1992" (UK; 1992-12-10), page 66
↑ Sega Pro, "April 1993" (UK; 1993-03-11), page 67
↑ Sega Saturn Magazine, "September 1995" (JP; 1995-08-08), page 85
↑ Tilt, "Septembre 1991" (FR; 1991-09-xx), page 68
↑ Tilt, "Décembre 1991" (FR; 1991-1x-xx), page 41
↑ Tricks 16 bit, "Tricks Sega Gold 800 igr" (RU; 1998-03-20), page 24
↑ Video Game, "Julho 1991" (BR; 1991-xx-xx), page 51
↑ Video Games, "2/91" (DE; 1991-06-07), page 10
↑ Zero, "August 1991" (UK; 1991-0x-xx), page 64
↑ Hidden Palace: Sonic the Hedgehog (Prototype)

Sonic the Hedgehog (Mega Drive)

Books: Sonic the Hedgehog 1 & 2: Sega's Official Player's Guide (1993) | Sonic the Hedgehog 1 & 2 Hisshou Kouryakuhou (1993) | An Official Player's Guide to Sonic the Hedgehog (1994)
Music: Sonic the Hedgehog 1&2 Soundtrack (2011) | Sonic the Hedgehog Tribute (2022)

Prototypes: Prototype

[https:.2F.2Farchive.ph.2FIUTx2-1] @U1_Toyama on Twitter (archive.today)

[https:.2F.2Fwww.mtwo.co.jp.2Fdevelopment.2Fretrogame-2.2F.23tab-1-2] ttps://www.mtwo.co.jp/development/retrogame-2/#tab-1

[:File:Sonic1_box_jap.jpg_p-3] File:Sonic1 box jap.jpg

[https:.2F.2Fweb.archive.org.2Fweb.2F20200720095133.2Fhttps:.2F.2Fsega.jp.2Fhistory.2Fhard.2Fmegadrive.2Fsoftware.html-4] 4.0 ^4.1 https://sega.jp/history/hard/megadrive/software.html (Wayback Machine: 2020-07-20 09:51)

[https:.2F.2Fweb.archive.org.2Fweb.2F20070209192440.2Fhttp:.2F.2Fvc.sega.jp:80.2Fvc_sonic.2F-5] 5.0 ^5.1 http://vc.sega.jp:80/vc_sonic/ (Wayback Machine: 2007-02-09 19:24)

[:File:VG.26amp.3BCE_US_29.pdf_p32-6] 6.0 ^6.1 VideoGames & Computer Entertainment, "June 1991" (US; 1991-0x-xx), page 32

[:File:MeanMachines_UK_10.pdf_p44-7] Mean Machines, "July 1991" (UK; 1991-06-29), page 44

[:File:Raze_UK_11.pdf_p76-8] Raze, "September 1991" (UK; 1991-07-25), page 76

[:File:SegaPower_UK_22.pdf_p11-9] Sega Power, "September 1991" (UK; 1991-08-01), page 11

[:File:AcaoGames_BR_004.pdf_p22-10] 10.0 ^10.1 Ação Games, "Agosto 1991" (BR; 1991-08-xx), page 22

[http:.2F.2Fweb.archive.org.2Fweb.2F20101122221924.2Fhttp:.2F.2Fwww.nintendo.com.2Fgames.2Fdetail.2FKxiDSMn_ADYC1Vd30TP-FW3yf8Byxwwu-11] 11.0 ^11.1 http://www.nintendo.com/games/detail/KxiDSMn_ADYC1Vd30TP-FW3yf8Byxwwu (Wayback Machine: 2010-11-22 22:19)

[http:.2F.2Fweb.archive.org.2Fweb.2F20171123050340.2Fhttps:.2F.2Fwww.nintendo.co.jp.2Fwii.2Fvc.2Fsoftware.2F01.html-12] ttps://www.nintendo.co.jp/wii/vc/software/01.html (Wayback Machine: 2017-11-23 05:03)

[http:.2F.2Fweb.archive.org.2Fweb.2F20180308002017.2Fhttp:.2F.2Fwww.nintendolife.com.2Fgames.2Fmegadrive.2Fsonic_the_hedgehog-13] 13.0 ^13.1 http://www.nintendolife.com/games/megadrive/sonic_the_hedgehog (Wayback Machine: 2018-03-08 00:20)

[http:.2F.2Fweb.archive.org.2Fweb.2F20120328005829.2Fhttp:.2F.2Fwww.nintendo.com.au.2Findex.php.3Faction.3Dcatalogue.26prodcat_id.3D41.26prod_id.3D19772.26pageID.3D4-14] ttp://www.nintendo.com.au/index.php?action=catalogue&prodcat_id=41&prod_id=19772&pageID=4 (Wayback Machine: 2012-03-28 00:58)

[https:.2F.2Fweb.archive.org.2Fweb.2F20180921222402.2Fhttps:.2F.2Fitunes.apple.com.2Fus.2Fapp.2Fsonic-the-hedgehog.2Fid316025912.3Fmt.3D8-15] ttps://itunes.apple.com/us/app/sonic-the-hedgehog/id316025912?mt=8 (Wayback Machine: 2018-09-21 22:24)

[http:.2F.2Fweb.archive.org.2Fweb.2F20171125193255.2Fhttp:.2F.2Fblogs.sega.com.2F2010.2F08.2F26.2Fsegas-back-to-school-iphone-sale.2F-16] ttp://blogs.sega.com/2010/08/26/segas-back-to-school-iphone-sale/ (Wayback Machine: 2017-11-25 19:32)

[http:.2F.2Fweb.archive.org.2Fweb.2F20180921224045.2Fhttps:.2F.2Fitunes.apple.com.2Ffr.2Fapp.2Fsonic-the-hedgehog.2Fid316050001.3Fmt.3D8-17] ttps://itunes.apple.com/fr/app/sonic-the-hedgehog/id316050001?mt=8 (Wayback Machine: 2018-09-21 22:40)

[http:.2F.2Fweb.archive.org.2Fweb.2F20180511013821.2Fhttps:.2F.2Fitunes.apple.com.2Fgb.2Fapp.2Fsonic-the-hedgehog.2Fid316050001.3Fmt.3D8-18] ttps://itunes.apple.com/gb/app/sonic-the-hedgehog/id316050001?mt=8 (Wayback Machine: 2018-05-11 01:38)

[https:.2F.2Fweb.archive.org.2Fweb.2F20091222092135.2Fhttp:.2F.2Fsega.jp.2Fkt.2Fapple.2Fsonic-19] 19.0 ^19.1 ^19.2 ^19.3 http://sega.jp/kt/apple/sonic (Wayback Machine: 2009-12-22 09:21)

[https:.2F.2Fweb.archive.org.2Fweb.2F20040802233224.2Fhttp:.2F.2Fgames.real.com.2Fallgames.php.3Fmode.3Dspnav-20] ttp://games.real.com/allgames.php?mode=spnav (Wayback Machine: 2004-08-02 23:32)

[http:.2F.2Fweb.archive.org.2Fweb.2F20191116224202.2Fhttps:.2F.2Fsteamdb.info.2Fapp.2F71113.2F-21] 21.0 ^21.1 ^21.2 ^21.3 ^21.4 https://steamdb.info/app/71113/ (Wayback Machine: 2019-11-16 22:42)

[http:.2F.2Fweb.archive.org.2Fweb.2F20130522201948.2Fhttp:.2F.2Fsteamdb.info.2Fapp.2F71113.2F-22] 22.0 ^22.1 ^22.2 ^22.3 ^22.4 http://steamdb.info/app/71113/ (Wayback Machine: 2013-05-22 20:19)

[https:.2F.2Fsteamdb.info.2Fapp.2F71113.2Fhistory.2F.3Fchangeid.3D5749722-23] 23.0 ^23.1 ^23.2 ^23.3 ^23.4 ^23.5 ^23.6 ^23.7 ^23.8 ^23.9 https://steamdb.info/app/71113/history/?changeid=5749722

[http:.2F.2Fweb.archive.org.2Fweb.2F20191116224202.2Fhttp:.2F.2Fsteamdb.info.2Fapp.2F71113.2F-24] 24.0 ^24.1 ^24.2 ^24.3 ^24.4 ^24.5 ^24.6 ^24.7 ^24.8 ^24.9 http://steamdb.info/app/71113/ (Wayback Machine: 2019-11-16 22:42)

[http:.2F.2Fweb.archive.org.2Fweb.2F20160429124818.2Fhttp:.2F.2Fblog.sonic-channel.jp.2Farchives.2F51661784.html-25] ttp://blog.sonic-channel.jp/archives/51661784.html (Wayback Machine: 2016-04-29 12:48)

[https:.2F.2Fweb.archive.org.2Fweb.2F20110121103248.2Fhttp:.2F.2Fsega.jp.2Fkt.2Fgoogle.2Fsonic.2F-26] ttp://sega.jp/kt/google/sonic/ (Wayback Machine: 2011-01-21 10:32)

[27] 1700 igr dlya Sega, "" (RU; 2001-xx-xx), page 215

[:File:ACE_UK_47.pdf_p54-28] ACE, "August 1991" (UK; 1991-07-08), page 54

[:File:ACE_UK_50.pdf_p128-29] ACE, "November 1991" (UK; 1991-10-08), page 128

[:File:BeepMD_JP_1991-08.pdf_p35-30] Beep! MegaDrive, "August 1991" (JP; 1991-07-08), page 35

[31] Cool Gamer, "9" (RU; 2002-10-13), page 193

[:File:CVG_UK_117.pdf_p16-32] Computer & Video Games, "August 1991" (UK; 1991-07-15), page 16

[:File:CVG_IT_08.pdf_p48-33] Computer + Video Giochi, "Settembre 1991" (IT; 1991-xx-xx), page 48

[:File:EGM_US_024.pdf_p24-34] Electronic Gaming Monthly, "July 1991" (US; 1991-xx-xx), page 24

[35] Entsiklopediya luchshikh igr Sega. Vypusk 1, "" (RU; 1999-xx-xx), page 359

[:File:Excalibur_CZ_16.pdf_p31-36] Excalibur, "" (CZ; 1993-04-10), page 31

[:File:GamePro_US_023.pdf_p44-37] GamePro, "June 1991" (US; 1991-xx-xx), page 44

[:File:TheGamesMachine_IT_034.pdf_p85-38] The Games Machine, "Settembre 1991" (IT; 1991-0x-xx), page 85

[:File:GamesX_UK_10.pdf_p14-39] Games-X, "27th June-3rd July 1991" (UK; 1991-06-27), page 14

[:File:HiScore_DK_01.pdf_p18-40] HiScore, "15 Juli - 15 September" (DK; 1993-07-15), page 18

[:File:HobbyConsolas_ES_001.pdf_p18-41] Hobby Consolas, "Octubre 1991" (ES; 1991-xx-xx), page 18

[:File:Joystick_FR_018.pdf_p164-42] Joystick, "Juillet/Août 1991" (FR; 1991-0x-xx), page 164

[:File:MDAG_UK_02.pdf_p79-43] Sega Mega Drive Advanced Gaming, "October 1992" (UK; 1992-xx-xx), page 79

[:File:MegaAction_UK_01.pdf_p65-44] Mega Action, "June 1993" (UK; 1993-05-20), page 65

[:File:MegaAction_UK_11.pdf_p80-45] Mega Action, "March 1994" (UK; 1994-02-24), page 80

[:File:Megablast_DE_1992-01.pdf_p44-46] Megablast, "Joker Extra Nr. 1" (DE; 1992-11-04), page 44

[:File:MegaPlay_US_05.pdf_p62-47] Mega Play, "July/August 1991" (US; 1991-0x-xx), page 62

[:File:MegaTech_UK_01.pdf_p48-48] MegaTech, "Xmas 1991" (UK; 1991-12-06), page 48

[:File:MegaTech_UK_06.pdf_p27-49] MegaTech, "June 1992" (UK; 1992-05-20), page 27

[:File:Micromania2_ES_041.pdf_p34-50] Micromanía (segunda época), "Octubre 1991" (ES; 1991-xx-xx), page 34

[:File:MeanMachines_UK_10.pdf_p42-51] Mean Machines, "July 1991" (UK; 1991-06-29), page 42

[:File:MeanMachinesSega10UK.pdf_p108-52] Mean Machines Sega, "August 1993" (UK; 1993-06-30), page 108

[:File:Megazone_AU_17.pdf_p22-53] Megazone, "August/September 1991" (AU; 1991-xx-xx), page 22

[:File:PlayerOne_FR_011.pdf_p26-54] Player One, "Juillet/Août 1991" (FR; 1991-xx-xx), page 26

[:File:Raze_UK_11.pdf_p34-55] Raze, "September 1991" (UK; 1991-07-25), page 34

[:File:SecretService_39_PL.pdf_p72-56] Secret Service, "Październik 1996" (PL; 1996-10-01), page 72

[:File:SegaPower_UK_22.pdf_p9-57] Sega Power, "September 1991" (UK; 1991-08-01), page 9

[:File:SegaPro_UK_06.pdf_p28-58] Sega Pro, "April 1992" (UK; 1992-03-19), page 28

[:File:SegaPro_UK_15.pdf_p66-59] Sega Pro, "Christmas 1992" (UK; 1992-12-10), page 66

[:File:SegaPro_UK_18.pdf_p67-60] Sega Pro, "April 1993" (UK; 1993-03-11), page 67

[:File:SSM_JP_19950901_1995-09.pdf_p85-61] Sega Saturn Magazine, "September 1995" (JP; 1995-08-08), page 85

[:File:Tilt_FR_093.pdf_p68-62] Tilt, "Septembre 1991" (FR; 1991-09-xx), page 68

[:File:Tilt_FR_097.pdf_p41-63] Tilt, "Décembre 1991" (FR; 1991-1x-xx), page 41

[64] Tricks 16 bit, "Tricks Sega Gold 800 igr" (RU; 1998-03-20), page 24

[:File:VideoGame_BR_05.pdf_p51-65] Video Game, "Julho 1991" (BR; 1991-xx-xx), page 51

[:File:VideoGames_DE_1991-02.pdf_p10-66] Video Games, "2/91" (DE; 1991-06-07), page 10

[:File:Zero_UK_22.pdf_p64-67] Zero, "August 1991" (UK; 1991-0x-xx), page 64

[https:.2F.2Fhiddenpalace.org.2FSonic_the_Hedgehog_.28Prototype.29-68] Hidden Palace: Sonic the Hedgehog (Prototype)

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Sonic the Hedgehog (Mega Drive)

From Sega Retro

Contents

Production credits

Magazine articles

Technical information

ROM dump status

References