Platform: Sega Genesis
Region: NTSC
Country: United States of America
Developer(s): Sonic Team
Publishers(s): Sega
ReleaseDate: 1994-10-18
Players: 1
Co-op: No
Blue Sphere
Also know as: Sonic blue sphere | Sonic the Hedgehog in Blue Sphere
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.
Trailer: YouTube
ESRB Rating: E - Everyone
Genre(s): Action | Platform