Difference between revisions of "Sonic Classics"

Revision as of 04:45, 20 June 2012

Not to be confused with Hez's fangame Sonic the Hedgehog Classic or the historical website named Sonic Classic.

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Sonic Classics
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System(s): Sega Mega Drive / Genesis
Publisher: Sega
Developer: Sega
Publisher(s) of original games: Sega
Developer(s) of original games: Sonic Team, Sega Technical Institute, Compile
Game total: 3
Original system(s): Sega Mega Drive
ESRB GRB

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Sonic Classics (USA) a.k.a. Sonic Compilation (Europe) is a compilation of three games for the Sega Mega Drive / Genesis stored on a single cartridge: Sonic the Hedgehog, Sonic the Hedgehog 2, and Dr. Robotnik's Mean Bean Machine. Sonic Classics was included as a pack-in title with some editions of the Mega Drive hardware in Europe. The game was not released in Japan.

The three games appear in almost exactly the same form as in their original release, with the exception of some revisions to their code (see their individual sections below). The only new content is a game selection menu, controlled by using the left and right directions on the D-pad and new sprite renderings of the box art for each of the three games. Once a game is selected, players are not able to go back to the menu unless the console is reset or turned off and on again.

This game is one of two that, when "locked on" with Sonic & Knuckles, will enable players to play the entire Blue Sphere game, instead of just one level. The other game that enables this is the standalone version of Sonic the Hedgehog. This is probably due to similarities in the code and/or headers of the two ROMs.

The background music and chime heard when a game is selected in the menu are from Dr. Robotnik's Mean Bean Machine itself.

Sonic the Hedgehog

This version of the original game is the same as the standard worldwide release, except for a new bug in Scrap Brain Zone involving the cycling palette. The bug is caused by the fact that the pointers for palette data are only two bytes long. In Sonic 1 alone, this isn't a problem because palette data lies within the first 0xFFFF of the ROM. However, in Sonic Classics, the data comes after 0x10000, so part of the address is truncated in the pointer, causing incorrect data to be loaded.

Sonic the Hedgehog 2

It was conjectured for some time that the version of Sonic 2 included in Sonic Classics was the former game's REV02, i.e. a second update to its code that had been officially (if silently) made by Sega themselves. This was shown conclusively in June of 2012 when Esrael, who was now using this version as the code-base for his famed hack Sonic 2 Delta, released a ROM of the game extracted to work on its own and

followed this shortly thereafter with his disassembly of said ROM, which demonstrated that Sega had implemented various bug-fixes and other alterations to the code in time for Sonic Classics.

Cheat codes

The original cheat codes contained on the cartridge still work here, but the game enhancer codes do not. See Cheat Codes:Sonic Classics.

Game secrets

See: Game Secrets:Sonic Classics.

Manuals

Resources

Original Sound Version Recordings

See Sonic Compilation OSV for a download page.

Physical scans

Mega Drive, US
Cover
Cart

Mega Drive, EU
Cover
Cart

Mega Drive, AU
Cover
Cart

Mega Drive, BR
Cover
Cart

Sonic the Hedgehog games for the following systems

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

@@ Line 1: / Line 1: @@
-:''Not to be confused with [[Hez]]<nowiki>'</nowiki>s fangame [[Sonic the Hedgehog Classic|Sonic Classic]]''
+:Not to be confused with [[Hez]]<nowiki>'</nowiki>s fangame ''[[Sonic the Hedgehog Classic]]'' or the historical website named [[Sonic Classic]].
 {{Bob
 |bobscreen=Scomp.png
-|publisher=[[Sega]]
+|publisher=[[sega:Sega|Sega]]
-|developer=[[Sega]]
+|developer=[[sega:Sega|Sega]]
-|originalpublishers=[[Sega]]
+|originalpublishers=[[sega:Sega|Sega]]
-|originaldevelopers=<br>[[Sonic Team]], [[Sega Technical Institute]], [[Compile]]
+|originaldevelopers=<br>[[sega:Sonic Team|Sonic Team]], [[sega:Sega Technical Institute|Sega Technical Institute]], [[sega:Compile|Compile]]
-|system=[[Sega Mega Drive/Genesis]]
+|system=[[sega:Sega Mega Drive|Sega Mega Drive / Genesis]]
 |gamecount=3
 |consolescompilation=Sega Mega Drive
@@ Line 13: / Line 14: @@
 |japan=Unreleased
 |esrb=ka|grb=a}}
-'''''Sonic Classics''''' is a compilation of three games stored on a single [[cartridge]]: ''[[Sonic 1]]'', ''[[Sonic 2]]'' and ''[[Dr. Robotnik's Mean Bean Machine]]''. Known as '''''Sonic Compilation''''' in Europe, ''Sonic Classics'' was not released in Japan. It was included as a pack-in for the Mega Drive in Europe.
-The three games appear in exactly the same form as in their original release. The only new content is a game selection menu, controlled by using the left and right directions on the D-pad and new sprite renderings of the box art for each of the three games. Once a game is selected, players are not able to go back to the menu unless the console is reset or turned off and on again.
+'''''Sonic Classics''''' (USA) a.k.a. '''''Sonic Compilation''''' (Europe) is a compilation of three games for the [[sega:Sega Mega Drive|Sega Mega Drive / Genesis]] stored on a single [[sega:cartridge|cartridge]]: ''[[Sonic the Hedgehog (16-bit)|Sonic the Hedgehog]]'', ''[[Sonic the Hedgehog 2 (16-bit)|Sonic the Hedgehog 2]]'', and ''[[Dr. Robotnik's Mean Bean Machine]]''. ''Sonic Classics'' was included as a pack-in title with some editions of the Mega Drive hardware in Europe. The game was not released in Japan.
+The three games appear in almost exactly the same form as in their original release, with the exception of some revisions to their code (see their individual sections below). The only new content is a game selection menu, controlled by using the left and right directions on the D-pad and new sprite renderings of the box art for each of the three games. Once a game is selected, players are not able to go back to the menu unless the console is reset or turned off and on again.
-This game is one of two that, when "locked on" with ''[[Sonic & Knuckles]]'', will enable players to play the entire ''[[Blue Sphere]]'' game, instead of just one level. The other game that enables this is the standalone version of ''[[Sonic the Hedgehog (16-bit)|Sonic the Hedgehog]]''.
+This game is one of two that, when "locked on" with ''[[Sonic & Knuckles]]'', will enable players to play the entire ''[[Blue Sphere]]'' game, instead of just one level. The other game that enables this is the standalone version of ''[[Sonic the Hedgehog (16-bit)|Sonic the Hedgehog]]''. This is probably due to similarities in the code and/or headers of the two [[sega:ROM|ROM]]s.
-The background music and chime heard when a game is selected on the game selection menu are from the ''Dr. Robotnik's Mean Bean Machine'' game.
+The background music and chime heard when a game is selected in the menu are from ''Dr. Robotnik's Mean Bean Machine'' itself.
-==Sonic the Hedgehog==
+==''Sonic the Hedgehog''==
-Same as the standard JUE release, except for a bug in [[Scrap Brain Zone]] involving the cycling [[palette]]. The bug is caused by the fact that the pointers for palette data are only two [[Byte|bytes]] long. In ''Sonic 1'' alone, this isn't a problem because palette data lies within the first 0xFFFF of the ROM. However in Sonic Classics, the data comes after 0x10000, so part of the address is truncated in the pointer, causing incorrect data to be loaded.
+This version of the original game is the same as the standard worldwide release<!-- Which one? REV00? -->, except for a new bug in [[Scrap Brain Zone]] involving the cycling [[palette]]. The bug is caused by the fact that the pointers for palette data are only two [[Byte|bytes]] long. In ''Sonic 1'' alone, this isn't a problem because palette data lies within the first 0xFFFF of the ROM. However, in ''Sonic Classics'', the data comes after 0x10000, so part of the address is truncated in the pointer, causing incorrect data to be loaded.
 ==''Sonic the Hedgehog 2''==
 It was conjectured for some time that the version of ''Sonic 2'' included in ''Sonic Classics'' was the former game's REV02, ''i.e.'' a second update to its code that had been officially (if silently) made by Sega themselves. This was shown conclusively in June of 2012 when [[Esrael]], who was now using this version as the code-base for his famed hack ''[[Sonic 2 Delta]]'', released a ROM of the game extracted to work on its own and {{LinkRetro|post=693487|title=followed}} this shortly thereafter with [[Disassemblies#Revision 02|his disassembly of said ROM]], which demonstrated that Sega had implemented various bug-fixes and other alterations to the code in time for ''Sonic Classics''.
-==Cheat Codes==
+==Cheat codes==
-The original cheat codes contained on the cartridge still work here. But the game enhancer codes do not. See:
+The original cheat codes contained on the cartridge still work here, but the game enhancer codes do not. See [[:Cheat Codes:Sonic Classics]].
-[[:Cheat Codes:Sonic Classics]]
-==Game Secrets==
+==Game secrets==
 See: [[Game Secrets:Sonic Classics]].
@@ Line 42: / Line 43: @@
 See [[Sonic Compilation OSV]] for a download page.
-===Physical Scans===
+===Physical scans===
 {{Scanbox
 | console=Mega Drive