Blue Sphere Plus

From Sonic Retro

Blue Sphere ROM menu.png
Blue Sphere Plus
Version: 11
Last release: 2011-05-16
Status: Active
System: Sega Mega Drive
ROM size: 1 MB
Original game: Sonic & Knuckles
Credits: MainMemory

Blue Sphere Plus is a Sonic & Knuckles hack created by MainMemory. It is based on the Blue Sphere Standalone ROM, with new features.

New Features

  • Pressing B or C now cycles between Sonic + Tails (blue + orange bumpers), Sonic alone (both blue), Tails (both orange), Knuckles + Tails (red + orange bumpers), and Knuckles (both red).
  • SRAM support to remember the character you last selected, and the last level completed.
  • If holding A while pressing Start to start a stage, the player starts all stages from then on at top speed (not saved between sessions).
  • You can now press Start at the first screen to reach the menu, instead of holding A + B + C.
  • Select "SONIC 3K" on the first menu, and you will play through all 16 of Sonic 3 & Knuckles' Special Stages in order, including the 2 "secret" ones. Saving and code entry are disabled while this mode is active, and the game will reset upon completion of the last stage.
  • Can Lock-On to other ROMs, including the Sonic games that would normally enable special modes when locked-on to Sonic & Knuckles.
  • Users can lock-on a file containing custom levels to play.

Known Issues

  • On real hardware, sound effects cause the music to glitch.
  • The code for a level from a locked-on ROM is displayed without having to complete it first.


Download.svg Download Blue Sphere Plus
File: Blue Sphere Plus v11.7z (267 kB) (info)
Current version: 11

Previous Versions

External links