Sonic the Hedgehog 2 (Sega Master System, Game Gear)

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Title Screen

Sonic the Hedgehog 2

Developer: Aspect
Publisher: Sega
Platforms: Sega Master System, Game Gear
Released in JP: November 21, 1992
Released in US: November 17, 1992
Released in EU: October 29, 1992 (Game Gear), October 16, 1992 (Master System)
Released in AU: 1992 (Master System)

DevTextIcon.png This game has hidden development-related text.
GraphicsIcon.png This game has unused graphics.
ItemsIcon.png This game has unused items.
MusicIcon.png This game has unused music.
LevelSelectIcon.png This game has a hidden level select.

Sonic the Hedgehog 2: featuring Tails as Princess Peach!


Unused Graphics

Character Sprites

Artwork Name Description
Sonic2GGTailsCry.gif "Crying Tails" Animation Tails crying. Probably meant to be used in the ending cutscene when he is rescued.
Sonic2GGOldIdle.png "Bored Sonic" Animation Three frames from Sonic 1 for the Master System. While the 8-bit versions of Sonic 2 used the spritesheet of the 8-bit Sonic 1, the waiting animation was changed. Hence, these are unused.
Sonic2SMSEarlyDeathSprite.png Early Death Sprite An early version of the death sprite. Sonic's shoes have no stripe and are outlined.
Sonic2GGUnderBossFull.png Underground Zone Boss body The entire body of the boss. Normally, only its head is visible.
Sonic2GGDuckFull.gif Sky High Zone Boss body The entire body of the boss. Normally, only its head and neck can be seen.


Artwork Name Description
Sonic2GGMonitor1.png Sonic Monitor While you can find this in a wall in Crystal Egg Zone, the graphics are obscured. When collected, it grants a continue.
Sonic2GGMonitor3.png Question Mark Monitor May have given a random amount of rings or items, like in the 2-player mode of the Genesis version.
Sonic2GGMonitor2.png Grey Sneaker Monitor May have slowed you down, like the Slow sneaker in the 2-player mode of Sonic 3.
Sonic2GGMonitor4.png Arrow Monitor Most likely intended to be a checkpoint marker, like the 8-bit versions of Sonic 1.

Level Art

To do:
There are (MANY) more.

Artwork Name Description
Sonic2GGUnderBricks.png Underground Zone Bricks Several unused bricks.
Sonic2GGUnderLoop.png Underground Zone Loop Apparently, a loop was planned for Underground Zone.
Sonic2GGUnderOther.png Underground Zone Tiles Miscellaneous unused pieces.
Sonic2GGUnderPlat.png Underground Zone Floating Platform An unused floating platform.
Sonic2GGBoulder.gif Sky High Zone boulder This boulder was probably supposed to roll down a hill in Act 1.
Sonic2GGSkyPlat.png Sky High Zone platform Another unused floating platform.
Sonic2GGSkyBlock.png Sky High Zone object Unknown purpose - another platform?
Sonic2GGWaterSlope.gif Unused Aqua Lake Zone block A small additional piece of land.
(Source: Sonic Retro)

Gimmick Mountain Title Card


Originally, the level card for Gimmick Mountain Zone used its full name. Due to lack of space on the screen, however, "Mountain" was shortened to "Mt."

(Source: Hivebrain)

Unused Text

A build date string can be found in the ROM at 0x000C0:

Master System:

MS SONIC THE HEDGEHOG.2 Ver1.00 1992/09/05 SEGA /Aspect Co.,Ltd

Game Gear:

GG SONIC THE HEDGEHOG.2 Ver1.10 1992/09/12 SEGA /Aspect Co.,Ltd

Unused Music

A peaceful, ethereal-sounding tune. What this song could have been used for is unknown.

Level Select


Master System: While powering on the game, hold Left + 1 + 2 on Controller 2. When the intro sequence starts, release the buttons, then start the game as usual.


Game Gear: When the intro starts, hold Down + Left + 1 + 2 + Start. When the title screen appears, wait for a ring sound to play twice (Tails will wink three times). Release all the buttons and press Start.