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

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Title Screen

Sonic the Hedgehog 2

Developer: Aspect
Publishers: Sega (JP/US/EU/AU), Tec Toy (BR)
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)
Released in BR: 1992 (Game Gear), 1993 (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.

ProtoIcon.png This game has a prototype article

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 While the majority of the game's Sonic graphics were copied from the Master System version of the first game, the waiting animation was changed, rendering these three frames unused.
Sonic2SMSEarlyDeathSprite.png Sonic 1 Death Sprite Sonic's death sprite from the Master System version of the first game.
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. Tiles similar to the gray bricks were used in the Autodemo prototype, but they were removed by the final version.
Sonic2GGUnderLoop.png Underground Zone Loop A leftover from the Autodemo prototype.
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 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.

Version Differences

To do:
This section is WIP: add more detail, elaboration, rip the boss/good ending music, etc.

The 8-bit versions of Sonic 2 are mostly identical, but there are some differences.

Master System

  • The intro starts with Tails already being kidnapped.
  • The sky in the intro is a bright cyan.
  • The music during the intro is the title screen music of the Game Gear version, and no music plays during the title screen.
  • The boss music differs from the Game Gear version.
  • The good ending uses music from the bad ending.

Game Gear

  • The intro is extended a bit further: it starts off with Tails walking in Green Hills Zone, and Sonic chases down Robotnik as he tries to kidnap Tails.
  • The sky in the intro is a very dark cyan.
  • The music during the intro is the music from Scrambled Egg Zone, with the Master System version's intro music used for the title screen.
  • The boss music is different from the Master System version.
  • The good ending has its own, happy-sounding, tune.
  • When Sonic (and Tails) look upon the stars at the end of the credits, a sound is played.
  • Speed Shoe monitors, if hacked into the game, do nothing when broken.
  • The bad ending music is longer.
  • The sound when Sonic spins on the wheels and orb in GMZ and CEZ is different.