Sonic Classics

Not to be confused with Hez's fangame Sonic Classic

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Sonic Classics
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 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.

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.

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.

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 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

• Sonic Classics US Manual
• Sonic Compilation EU Manual

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      Prototypes  Sonic the Hedgehog | Sonic the Hedgehog 2 | Sonic the Hedgehog CD | Sonic Spinball | Dr. Robotnik's Mean Bean Machine | Sonic the Hedgehog 3 | Sonic & Knuckles | Knuckles in Sonic 2 | Chaotix | Sonic 3D: Flickies' Island  Unreleased  Sonic the Hedgehog (Mega-CD) | Sonic the Hedgehog 2 CD | Sister Sonic | Treasure Tails | Sonic-16 | Sonic the Hedgehog 3 Limited Edition | Sonic Sports | Sonic Mars