Difference between revisions of "Sonic the Hedgehog 2 (8-bit)"

From Sega Retro

(71 intermediate revisions by 17 users not shown)
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{{bob
+
{{OtherPage|desc=other products called Sonic the Hedgehog 2|page=Sonic the Hedgehog 2}}
 +
{{Bob
 
| bobscreen=S2 sms title.png
 
| bobscreen=S2 sms title.png
 +
| bobscreen2=S2ggtitle.png
 +
| tab1=Master System
 +
| tab2=Game Gear
 
| title=Sonic the Hedgehog 2
 
| title=Sonic the Hedgehog 2
| developer=[[Aspect]]
 
 
| publisher=[[Sega]]
 
| publisher=[[Sega]]
 +
{{company|[[Majesco Sales]]|region=US; re-release|system=GG}}
 +
| developer=
 +
{{company|[[Sega CS2]]|system=SMS,GG}}
 +
{{company|[[Aspect]]|role=programming|system=SMS,GG}}
 +
{{company|[[M2]]{{ref|https://www.mtwo.co.jp/development/retrogame-2/#tab-2}}{{ref|https://www.mtwo.co.jp/development/retrogame-2/#tab-4}}|system=VC,VC3DS}}
 
| system=[[Sega Master System]], [[Sega Game Gear]], [[Virtual Console]]
 
| system=[[Sega Master System]], [[Sega Game Gear]], [[Virtual Console]]
| romsize=512kB
+
| sounddriver=
| genre=Action
+
| peripherals=
| releases={{releases
+
| players=1
| sms_date_eu=1992-10-16
+
| genre=Action{{fileref|S2gg-box-back-eu.jpg}}{{ref|https://web.archive.org/web/20181207045745/https://sega.jp/history/hard/gamegear/software.html}}{{fileref|Sonic2ms-box-eu.jpg}}{{fileref|Sonic2 SMS KR cover.jpg}}
 +
| releases={{releasesSMS
 +
| sms_date_eu=1992-11-24{{magref|ctw|414|18}}{{fileref|DailyExpress UK 1992-11-20 17.jpg}}{{fileref|DailyMirror UK 1992-11-20 Sup 08.jpg}}
 
| sms_code_eu=9015
 
| sms_code_eu=9015
 +
| sms_date_uk=1992-11-24{{magref|ctw|414|18}}{{fileref|DailyExpress UK 1992-11-20 17.jpg}}{{fileref|DailyMirror UK 1992-11-20 Sup 08.jpg}}
 +
| sms_code_uk=9015
 +
| sms_rrp_uk=32.99{{magref|mms|2|64}}<!--34.99{{magref|sfuk|12|31}}-->
 
| sms_date_au=1992
 
| sms_date_au=1992
 
| sms_date_br=1992
 
| sms_date_br=1992
Line 15: Line 28:
 
| sms_date_kr=199x
 
| sms_date_kr=199x
 
| sms_code_kr=GB4030JG
 
| sms_code_kr=GB4030JG
| gg_date_eu=1992-10-29
+
| sms_date_pt=1992
 +
| sms_code_pt=MSJ9015
 +
| sms_date_de=1992-11
 +
| sms_code_de=9015
 +
| sms_rrp_de=89.95{{magref|segamagazin|1|70}}
 +
}}
 +
{{releasesGG
 +
| gg_date_jp=1992-11-21{{ref|https://web.archive.org/web/20181207045745/https://sega.jp/history/hard/gamegear/software.html}}
 +
| gg_code_jp=G-3321
 +
| gg_rrp_jp=3,800
 +
| gg_date_jp_m=1993-12-10
 +
| gg_code_jp_m=G-3338
 
| gg_date_us=1992-11-17
 
| gg_date_us=1992-11-17
 +
| gg_rrp_us=39.99{{magref|gamepro|44|163}}
 
| gg_code_us=2507
 
| gg_code_us=2507
| gg_date_jp=1992-11-21
+
| gg_date_us_m=2001
| gg_rrp_jp=3,800
+
| gg_code_us_m=2507
| gg_code_jp=G-3321
+
| gg_date_eu=1992-11-24{{magref|ctw|414|18}}{{fileref|DailyExpress UK 1992-11-20 17.jpg}}{{fileref|DailyMirror UK 1992-11-20 Sup 08.jpg}}
| gg_type_jp_1=Meisaku
+
| gg_code_eu=2507
| gg_date_jp_1=1993-12-10
+
| gg_date_uk=1992-11-24{{magref|ctw|414|18}}{{fileref|DailyExpress UK 1992-11-20 17.jpg}}{{fileref|DailyMirror UK 1992-11-20 Sup 08.jpg}}
| gg_code_jp_1=G-3338
+
| gg_code_uk=2507
 +
| gg_rrp_uk=27.99{{magref|cvg|go14|12}}<!--29.99{{magref|sfuk|12|32}}-->
 +
| gg_date_de=1992
 +
| gg_code_de=2507
 +
| gg_rrp_de=89.95{{magref|segamagazin|1|71}}
 
| gg_date_kr=199x
 
| gg_date_kr=199x
 
| gg_code_kr=GH4013JG
 
| gg_code_kr=GH4013JG
 +
| gg_date_au=199x
 +
| gg_rrp_au=79.99{{ref|1=https://web.archive.org/web/20230709065940/https://trove.nla.gov.au/newspaper/article/126960710?searchTerm=sonic%20the%20hedgehog}}
 +
| gg_code_au=
 
| gg_date_br=199x
 
| gg_date_br=199x
 
| gg_code_br=077010
 
| gg_code_br=077010
 +
| gg_date_pt=1992
 +
| gg_code_pt=GGJ2507
 +
| gg_date_cz=199x
 
}}
 
}}
 
{{releasesWii
 
{{releasesWii
| vc_date_jp=2008-11-18
+
| vc_date_jp=2008-11-18{{ref|http://web.archive.org/web/20180128132704/https://www.nintendo.co.jp/wii/vc/software/09.html}}
| vc_rrp_jp=500
+
| vc_rrp_jp=500{{ref|http://web.archive.org/web/20090207211638/http://vc.sega.jp:80/vc_sonic2ms/}}
| vc_date_us=2008-12-08
+
| vc_rating_jp=a
| vc_rrp_us=500
+
| vc_date_us=2008-12-08{{ref|http://web.archive.org/web/20101122225040/http://www.nintendo.com/games/detail/ivseDC_bdb4lv4aJ0oR_k2oSJ6-yQwaz}}
| vc_date_eu=2008-12-26
+
| vc_rrp_us=500{{ref|http://web.archive.org/web/20101122225040/http://www.nintendo.com/games/detail/ivseDC_bdb4lv4aJ0oR_k2oSJ6-yQwaz}}
| vc_rrp_eu=500
+
| vc_rating_us=e
 +
| vc_date_eu=2008-12-26{{ref|http://web.archive.org/web/20170704164837/http://www.nintendolife.com/games/mastersystem/sonic_the_hedgehog_2}}{{ref|https://archive.is/jhXZy|https://www.nintendo.fr/Jeux/SEGA-Game-Gear/Sonic-the-Hedgehog-2--772258.html}}
 +
| vc_rrp_eu=500{{ref|http://web.archive.org/web/20170704164837/http://www.nintendolife.com/games/mastersystem/sonic_the_hedgehog_2}}
 +
| vc_rating_eu=3
 +
| vc_date_au=2008-12
 +
| vc_rrp_au=600{{ref|1=http://web.archive.org/web/20120328013835/http://www.nintendo.com.au/index.php?action=catalogue&prodcat_id=42&prod_id=19904&pageID=4}}
 +
| vc_rating_au=g
 
}}
 
}}
 
{{releases3DS
 
{{releases3DS
| vc3ds_date_jp=2012-10-31
+
| vc3ds_date_jp=2012-10-31{{ref|http://web.archive.org/web/20121028183557/http://vc.sega.jp:80/3ds/sonic2/}}
| vc3ds_rrp_jp=286 (''300'')
+
| vc3ds_rrp_jp=286 (''300''){{ref|http://web.archive.org/web/20121028183557/http://vc.sega.jp:80/3ds/sonic2/}}
| vc3ds_date_us=2013-06-27
+
| vc3ds_rating_jp=a
| vc3ds_rrp_us=4.99
+
| vc3ds_date_us=2013-06-27{{ref|http://web.archive.org/web/20130630102737/http://www.nintendo.com:80/games/detail/eZ_9L3ar33k2nmh_r678BsH2KplLPcoO}}
| vc3ds_date_eu=2013-06-27
+
| vc3ds_rrp_us=4.99{{ref|http://web.archive.org/web/20130630102737/http://www.nintendo.com:80/games/detail/eZ_9L3ar33k2nmh_r678BsH2KplLPcoO}}
| vc3ds_rrp_uk=4.49
+
| vc3ds_rating_us=e
| vc3ds_rrp_eu=4.99
+
| vc3ds_date_eu=2013-06-27{{ref|https://archive.is/v7gT2|https://www.nintendo.fr/Jeux/SEGA-Game-Gear/Sonic-the-Hedgehog-2--772258.html}}
 +
| vc3ds_rrp_eu=4.99{{ref|http://web.archive.org/web/20170909220431/http://www.nintendolife.com:80/games/gamegear/sonic_the_hedgehog_2}}
 +
| vc3ds_rating_eu=3
 +
| vc3ds_date_uk=2013-06-27{{ref|https://archive.is/mJjNN|https://www.nintendo.co.uk/Games/SEGA-Game-Gear/Sonic-the-Hedgehog-2--772258.html}}
 +
| vc3ds_rrp_uk=4.49{{ref|http://web.archive.org/web/20170909220431/http://www.nintendolife.com:80/games/gamegear/sonic_the_hedgehog_2}}
 +
| vc3ds_rating_uk=3
 +
| vc3ds_date_de=2013-06-27{{ref|https://archive.is/qivHR|https://www.nintendo.de/Spiele/SEGA-Game-Gear/Sonic-the-Hedgehog-2--772258.html}}
 +
| vc3ds_rrp_de=4.99{{ref|http://web.archive.org/web/20170909220431/http://www.nintendolife.com:80/games/gamegear/sonic_the_hedgehog_2}}
 +
| vc3ds_rating_de=6
 
}}
 
}}
|esrb=e|pegi=3|cero=free|usk=0|oflc=g8|grb=a
 
 
}}
 
}}
 
{{sonic}}
 
{{sonic}}
 +
 +
 +
==Production credits==
 +
===Master System version===
 +
{{multicol|
 +
{{creditstable|
 +
*'''Compose:''' [[Tomozou Endo|Tomozou]], Simachan, Ray
 +
*'''Program:''' Ko.Ko, Semimaru, Tea Tea, [[Toshiyan|Tosiyan]]
 +
*'''Art:''' [[7LY Big King|Jly King]], [[Noburin]], [[A.Tezuka|Tez]], [[U.D.K.|U.D.K]]
 +
*'''Edit:''' [[Raizou]], [[Masato Shimamura|M.Shima]], End, Mariyuri
 +
*'''Sound:''' [[Masafumi Ogata|Gatao]], [[Naofumi Hataya|Nao Chan]], [[Tomonori Sawada|Dawasa]]
 +
*'''Thanks:''' [[Hiroshi Aso|Asohy]], [[Taku Shoji|Taku.S]], [[Katsuhiro Hasegawa|The Hase]], [[Takashi Thomas Yuda|Thomas Y]], Okusan, [[Kenji Shintani|Lunarian]], [[Hitmen]], [[Aspect]], .and You
 +
| source=In-game credits
 +
| pdf=Sonic the Hedgehog 2 SMS credits.pdf
 +
| console=SMS
 +
}}}}
 +
 +
===Game Gear version===
 +
{{multicol|
 +
{{creditstable|
 +
*'''Compose:''' [[Tomozou Endo|Tomozou]], Simachan, Ray
 +
*'''Program:''' Ko.Ko, [[Hiro. 777|Hiro SSS]], Tea Tea, [[Toshiyan]]
 +
*'''Art:''' [[7LY Big King|Jly King]], [[Noburin]], [[A.Tezuka|Tez]], [[U.D.K.|U.D.K]]
 +
*'''Edit:''' [[Raizou]], [[Masato Shimamura|M.Shima]], End, Mariyuri
 +
*'''Sound:''' [[Masafumi Ogata|Gatao]], [[Naofumi Hataya|Nao Chan]], [[Tomonori Sawada|Dawasa]]
 +
*'''Thanks:''' [[Hiroshi Aso|Asohy]], [[Taku Shoji|Taku.S]], [[Katsuhiro Hasegawa|The Hase]], [[Takashi Thomas Yuda|Thomas Y]], [[Ryuichi Hattori|Ryu]], Okusan, [[Kenji Shintani|Lunarian]], [[Hitmen]], [[Aspect]], .and You
 +
| source=In-game credits
 +
| pdf=Sonic the Hedgehog 2 GG credits.pdf
 +
| console=GG
 +
}}}}
 +
 +
==Magazine articles==
 +
{{ratings|SMS}}
 +
{{ratings|GG}}
 +
{{mainArticle|{{PAGENAME}}/Magazine articles}}
 +
 +
==Technical information==
 +
===ROM dump status===
 +
{{romtable|
 +
{{rom|SMS|sha1=acdb0b5e8bf9c1e9c9d1a8ac6d282cb8017d091c|md5=bf3b7a41e7da9de23416473a33c6ac2b|crc32=5b3b922c|size=512KB|date=1992-09-05{{intref|sonic:Sonic the Hedgehog 2 (8-bit)/Hidden content#Build date}}|source=Cartridge (EU/BR)|comments=v1.0|quality=good}}
 +
{{rom|SMS|sha1=689339bac11c3565dd774f8cd4d8ea1b27831118|md5=0ac157b6b7e839953fc8eba7538fb74a|crc32=d6f2bfca|size=512KB|date=1992-12-09{{intref|sonic:Sonic the Hedgehog 2 (8-bit)/Hidden content#Build date}}|source=Cartridge (EU/BR)|comments=v2.2|quality=good}}
 +
{{rom|GG|sha1=dabb452e416b4fa9cb83d8ddd307c2a32c3a1a7f|md5=9c64846563d8b9a24400471322e53fb5|crc32=95a18ec7|size=512KB|date=1992-09-12{{intref|sonic:Sonic the Hedgehog 2 (8-bit)/Hidden content#Build date}}|source=Cartridge (World)|comments=v1.1|quality=good}}
 +
{{rom|GG|sha1=ba720d925fbed0d68e1d35f61c6f4fec47708718|md5=39332eb123aeb1b906c70948641fe889|crc32=850727a0|size=512KB|date=|source=3DS Virtual Console (World)|comments=|icon=VirtualConsole Sonic2 3DS World Icon.png|quality=good}}
 +
{{rom|GG|sha1=b780c6f059b48d1bb48ee2ad521552dab1487c88|md5=ab191d48adc692adb19f429183361ea7|crc32=15ad37a5|size=256KB|date=1991-12-05|source=EPROM cartridge|comments=AutoDemo|quality=good|prototype=yes|protoname=Game Gear AutoDemo}}
 +
}}
 +
 +
==References==
 +
<references/>
 +
 +
{{Sonic28bitOmni}}

Revision as of 10:48, 3 April 2024

For other products called Sonic the Hedgehog 2, see Sonic the Hedgehog 2.

n/a

  • Master System
  • Game Gear

S2 sms title.png

S2ggtitle.png

Sonic the Hedgehog 2
System(s): Sega Master System, Sega Game Gear, Virtual Console
Publisher: Sega
Sega Game Gear
Majesco Sales (US; re-release)
Developer:
Genre: Action[3][4][5][6]

















Number of players: 1
Release Date RRP Code
Sega Master System
EU
9015
Sega Master System
DE
DM 89.9589.95[12] 9015
Sega Master System
PT
MSJ9015
Sega Master System
UK
£32.9932.99[11] 9015
Sega Master System
AU
Sega Master System
BR
028120
Sega Master System
KR
GB4030JG
Sega Game Gear
JP
¥3,8003,800 G-3321
Sega Game Gear
JP
(Meisaku)
G-3338
Sega Game Gear
US
$39.9939.99[13] 2507
Sega Game Gear
US
(Majesco)
2507
Sega Game Gear
EU
2507
Sega Game Gear
DE
DM 89.9589.95[17] 2507
Sega Game Gear
PT
GGJ2507
Sega Game Gear
UK
£27.9927.99[16] 2507
Sega Game Gear
CZ
Sega Game Gear
AU
$79.9979.99[18]
Sega Game Gear
BR
077010
Sega Game Gear
KR
GH4013JG
Wii Virtual Console
JP
500pts500[20]
CERO: A
Wii Virtual Console
US
500pts500[21]
ESRB: Everyone
Wii Virtual Console
EU
500pts500[22]
PEGI: 3+
Wii Virtual Console
AU
600pts600[24]
OFLC: General (G)
Nintendo 3DS Virtual Console
JP
¥286 (300)286 (300)[25]
CERO: A
Nintendo 3DS Virtual Console
US
$4.994.99[26]
ESRB: Everyone
Nintendo 3DS Virtual Console
EU
€4.994.99[28]
PEGI: 3+
Nintendo 3DS Virtual Console
DE
€4.994.99[28]
USK: 6
Nintendo 3DS Virtual Console
UK
£4.494.49[28]
PEGI: 3+
Sonicretro-round.svg

Visit Sonic the Hedgehog 2 (8-bit) on Sonic Retro for the full article.


Production credits

Master System version

Source:
In-game credits[31]

Game Gear version

Source:
In-game credits[32]

Magazine articles

Sega Retro Average 
Publication Score Source
{{{{{icon}}}|L}} Division by zero.
Based on
0 review
Sega Retro Average 
Publication Version Score
Aktueller Software Markt (DE) PAL
83
[33]
Consoles + (FR)
95
[34]
Computer & Video Games (UK) PAL
93
[35]
Game Mania (UK) PAL
96
[36]
Game Power (IT)
92
[37]
Gamers (DE) PAL
73
[38]
Hobby Consolas (ES) PAL
93
[39]
Joypad (FR)
98
[40]
Joystick (FR) PAL
94
[41]
Mega Force (FR) PAL
95
[42]
Mean Machines Sega (UK) PAL
95
[11]
Megazone (AU) PAL
93
[43]
OK Consolas (ES) PAL
92
[44]
Player One (FR) PAL
95
[45]
Sega News (CZ)
93
[46]
Sega Power (UK) PAL
93
[47]
Sega Power (UK) PAL
100
[48]
Sega Pro (UK) PAL
93
[49]
Sega Zone (UK) PAL
90
[50]
Sega Force (SE)
98
[51]
Sega Force (UK) PAL
92
[52]
Sega Master Force (UK) PAL
92
[53]
Supersonic (FR)
97
[54]
User (GR) PAL
92
[55]
Video Games (DE) PAL
80
[56]
Sega Master System
92
Based on
25 reviews

Sonic the Hedgehog 2 (8-bit)

Sega Retro Average 
Publication Score Source
{{{{{icon}}}|L}} Division by zero.
Based on
0 review
Sega Retro Average 
Publication Version Score
Aktueller Software Markt (DE) PAL
83
[33]
Beep! MegaDrive (JP) NTSC-J
60
[57]
Consoles + (FR)
90
[58]
Computer & Video Games (UK) PAL
92
[16]
Computer + Video Giochi (IT)
92
[59]
Famitsu (JP) NTSC-J
60
[60]
Game Mania (UK) PAL
80
[61]
Game Power (IT)
94
[37]
GamePro (US) NTSC-U
93
[62]
Hobby Consolas (ES) PAL
91
[63]
Joypad (FR)
98
[64]
Joystick (FR) PAL
98
[65]
Mega Force (FR) PAL
85
[66]
Megazin (SI)
80
[67]
Mean Machines Sega (UK) PAL
80
[68]
Player One (FR)
92
[69]
Play Time (DE)
87
[70]
Power Play (DE)
78
[71]
Sega Power (UK) PAL
97
[72]
Sega Pro (UK) PAL
95
[73]
Sega Force Mega (UK) PAL
93
[74]
Sega Force (SE)
93
[75]
Sega Force (UK) PAL
93
[76]
Sega Saturn Magazine (JP) NTSC-J
59
[77]
Video Games (DE) PAL
78
[78]
Sega Game Gear
86
Based on
25 reviews

Sonic the Hedgehog 2 (8-bit)

Main article: Sonic the Hedgehog 2 (8-bit)/Magazine articles.

Technical information

ROM dump status

System Hash Size Build Date Source Comments
Sega Master System
CRC32 5b3b922c
MD5 bf3b7a41e7da9de23416473a33c6ac2b
SHA-1 acdb0b5e8bf9c1e9c9d1a8ac6d282cb8017d091c
512kB 1992-09-05[79] Cartridge (EU/BR) v1.0
Sega Master System
CRC32 d6f2bfca
MD5 0ac157b6b7e839953fc8eba7538fb74a
SHA-1 689339bac11c3565dd774f8cd4d8ea1b27831118
512kB 1992-12-09[79] Cartridge (EU/BR) v2.2
Sega Game Gear
CRC32 95a18ec7
MD5 9c64846563d8b9a24400471322e53fb5
SHA-1 dabb452e416b4fa9cb83d8ddd307c2a32c3a1a7f
512kB 1992-09-12[79] Cartridge (World) v1.1
Sega Game Gear
CRC32 850727a0
MD5 39332eb123aeb1b906c70948641fe889
SHA-1 ba720d925fbed0d68e1d35f61c6f4fec47708718
512kB 3DS Virtual Console (World) VirtualConsole Sonic2 3DS World Icon.png
Sega Game Gear
CRC32 15ad37a5
MD5 ab191d48adc692adb19f429183361ea7
SHA-1 b780c6f059b48d1bb48ee2ad521552dab1487c88
256kB 1991-12-05 EPROM cartridge AutoDemo Page

References

  1. https://www.mtwo.co.jp/development/retrogame-2/#tab-2
  2. https://www.mtwo.co.jp/development/retrogame-2/#tab-4
  3. File:S2gg-box-back-eu.jpg
  4. 4.0 4.1 https://sega.jp/history/hard/gamegear/software.html (Wayback Machine: 2018-12-07 04:57)
  5. File:Sonic2ms-box-eu.jpg
  6. File:Sonic2 SMS KR cover.jpg
  7. Computer Trade Weekly, "" (UK; 1992-11-23), page 18
  8. 8.0 8.1 8.2 8.3 File:DailyExpress UK 1992-11-20 17.jpg
  9. 9.0 9.1 9.2 9.3 File:DailyMirror UK 1992-11-20 Sup 08.jpg
  10. Computer Trade Weekly, "" (UK; 1992-11-23), page 18
  11. 11.0 11.1 Mean Machines Sega, "November 1992" (UK; 1992-10-xx), page 64
  12. Sega Magazin, "September/Oktober 1993" (DE; 1993-09-01), page 70
  13. GamePro, "March 1993" (US; 1993-xx-xx), page 163
  14. Computer Trade Weekly, "" (UK; 1992-11-23), page 18
  15. Computer Trade Weekly, "" (UK; 1992-11-23), page 18
  16. 16.0 16.1 Computer & Video Games, "December 1992 (Go! Issue 14)" (UK; 1992-11-15), page 12
  17. Sega Magazin, "September/Oktober 1993" (DE; 1993-09-01), page 71
  18. https://trove.nla.gov.au/newspaper/article/126960710?searchTerm=sonic%20the%20hedgehog (Wayback Machine: 2023-07-09 06:59)
  19. https://www.nintendo.co.jp/wii/vc/software/09.html (Wayback Machine: 2018-01-28 13:27)
  20. http://vc.sega.jp:80/vc_sonic2ms/ (Wayback Machine: 2009-02-07 21:16)
  21. 21.0 21.1 http://www.nintendo.com/games/detail/ivseDC_bdb4lv4aJ0oR_k2oSJ6-yQwaz (Wayback Machine: 2010-11-22 22:50)
  22. 22.0 22.1 http://www.nintendolife.com/games/mastersystem/sonic_the_hedgehog_2 (Wayback Machine: 2017-07-04 16:48)
  23. https://www.nintendo.fr/Jeux/SEGA-Game-Gear/Sonic-the-Hedgehog-2--772258.html (archive.today)
  24. http://www.nintendo.com.au/index.php?action=catalogue&prodcat_id=42&prod_id=19904&pageID=4 (Wayback Machine: 2012-03-28 01:38)
  25. 25.0 25.1 http://vc.sega.jp:80/3ds/sonic2/ (Wayback Machine: 2012-10-28 18:35)
  26. 26.0 26.1 http://www.nintendo.com:80/games/detail/eZ_9L3ar33k2nmh_r678BsH2KplLPcoO (Wayback Machine: 2013-06-30 10:27)
  27. https://www.nintendo.fr/Jeux/SEGA-Game-Gear/Sonic-the-Hedgehog-2--772258.html (archive.today)
  28. 28.0 28.1 28.2 http://www.nintendolife.com:80/games/gamegear/sonic_the_hedgehog_2 (Wayback Machine: 2017-09-09 22:04)
  29. https://www.nintendo.co.uk/Games/SEGA-Game-Gear/Sonic-the-Hedgehog-2--772258.html (archive.today)
  30. https://www.nintendo.de/Spiele/SEGA-Game-Gear/Sonic-the-Hedgehog-2--772258.html (archive.today)
  31. File:Sonic the Hedgehog 2 SMS credits.pdf
  32. File:Sonic the Hedgehog 2 GG credits.pdf
  33. 33.0 33.1 Aktueller Software Markt, "Februar 1993" (DE; 1993-01-11), page 127
  34. Consoles +, "Janvier 1993" (FR; 199x-xx-xx), page 118
  35. Computer & Video Games, "November 1992" (UK; 1992-10-15), page 24
  36. Game Mania, "May 1993" (UK; 1993-xx-xx), page 81
  37. 37.0 37.1 Game Power, "Gennaio 1993" (IT; 199x-xx-xx), page 44
  38. Gamers, "Dezember/Januar 1993" (DE; 1992-11-19), page 44
  39. Hobby Consolas, "Diciembre 1992" (ES; 1992-xx-xx), page 46
  40. Joypad, "Novembre 1992" (FR; 1992-1x-xx), page 76
  41. Joystick, "Décembre 1992" (FR; 1992-1x-xx), page 180
  42. Mega Force, "Novembre 1992" (FR; 1992-11-09), page 74
  43. Megazone, "December/January 1992/1993" (AU; 1992-xx-xx), page 33
  44. OK Consolas, "xxxx 1992" (ES; 1992-xx-xx), page 8
  45. Player One, "Novembre 1992" (FR; 1992-11-10), page 60
  46. Sega News, "Listopad 1996" (CZ; 1996-1x-xx), page 35
  47. Sega Power, "December 1992" (UK; 1992-11-05), page 38
  48. Sega Power, "September 1993" (UK; 1993-08-05), page 101
  49. Sega Pro, "Christmas 1992" (UK; 1992-12-10), page 59
  50. Sega Zone, "December 1992" (UK; 1992-11-xx), page 20
  51. Sega Force, "1/93" (SE; 1993-01-14), page 19
  52. Sega Force, "December 1992" (UK; 1992-11-05), page 30
  53. Sega Master Force, "September 1993" (UK; 1993-07-22), page 13
  54. Supersonic, "Janvier 1993" (FR; 199x-xx-xx), page 24
  55. User, "Mártios 1993" (GR; 1993-0x-xx), page 52
  56. Video Games, "1/93" (DE; 1992-12-16), page 102
  57. Beep! MegaDrive, "December 1992" (JP; 1992-11-07), page 32
  58. Consoles +, "Janvier 1993" (FR; 199x-xx-xx), page 146
  59. Computer + Video Giochi, "Gennaio 1993" (IT; 199x-xx-xx), page 71
  60. Famitsu, "1992-11-27" (JP; 1992-11-13), page 42
  61. Game Mania, "May 1993" (UK; 1993-xx-xx), page 70
  62. GamePro, "March 1993" (US; 1993-xx-xx), page 162
  63. Hobby Consolas, "Enero 1993" (ES; 199x-xx-xx), page 68
  64. Joypad, "Janvier 1993" (FR; 199x-xx-xx), page 144
  65. Joystick, "Janvier 1993" (FR; 199x-xx-xx), page 233
  66. Mega Force, "Janvier 1993" (FR; 199x-xx-xx), page 70
  67. Megazin, "Letnik 1, Številka 2, Oktober 1993" (SI; 1993-xx-xx), page 29
  68. Mean Machines Sega, "December 1992" (UK; 1992-11-xx), page 118
  69. Player One, "Janvier/Février 1993" (FR; 1993-01-10), page 102
  70. Play Time, "2/93" (DE; 1993-01-07), page 109
  71. Power Play, "3/93" (DE; 1993-02-10), page 110
  72. Sega Power, "January 1993" (UK; 1992-12-03), page 67
  73. Sega Pro, "Christmas 1992" (UK; 1992-12-10), page 63
  74. Sega Force Mega, "January 1994" (UK; 1993-12-16), page 78
  75. Sega Force, "4/93" (SE; 1993-07-08), page 22
  76. Sega Force, "December 1992" (UK; 1992-11-05), page 32
  77. Sega Saturn Magazine, "September 1995" (JP; 1995-08-08), page 88
  78. Video Games, "2/93" (DE; 1993-01-27), page 120
  79. 79.0 79.1 79.2 Sonic the Hedgehog 2 (8-bit)/Hidden content#Build date


Sonic the Hedgehog 2 (8-bit)

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Books: Sonic the Hedgehog 1 & 2: Sega's Official Player's Guide (1993) | An Official Player's Guide to Sonic the Hedgehog (1994)
Sega Game Gear
Prototypes: Game Gear AutoDemo