Games of the 8-, 16- & 32-bit era

Blue Sphere

Title	Blue Sphere
First release	1994
Developer	Sonic Team
Publisher	Sega
Platform	Mega Drive / Genesis
Genres	action game, platformer
Also known as	Sonic blue sphere · Sonic the Hedgehog in Blue Sphere
Players	1 player
Co-op	No
ESRB rating	E Everyone
Releases	Mega Drive / Genesis: 1994-10-18 (NTSC)

Blue Sphere, known as Special Stage Mode in Sonic & Knuckles Collection, is an easter egg video game in the Sonic the Hedgehog franchise, built into the Sonic & Knuckles cartridge for the Sega Mega Drive, accessible by attaching any Mega Drive game cartridge (other than Sonic the Hedgehog 2, Sonic the Hedgehog 3 or Sonic & Knuckles) into the Sonic & Knuckles lock-on port. Blue Sphere is a collection of Special Stages in the same style and engine of those featured in Sonic the Hedgehog 3 and Sonic & Knuckles.

Description: TheGamesDB (community-contributed, no licence stated; internal use only)

Facts from TheGamesDB (community-contributed, no licence stated; internal use only); they may contain errors. Developer and publisher names are not in the TheGamesDB dump and are added once resolved. Only retro platforms tracked by this site are listed.